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Worksheets5.2 Systems Elimination and Word Problems
Total questions: 70
Worksheet time: 8hrs 50mins
13.5x - 13y = 6
x - y = 6
3x + 7y = 13.5
3x - 7y = 13.5
3S + 4A = 1740
4S + 3A = 1740
3S + 4A = 530
4S + 3A = 530
What do you get for y when you start solving
2
-1
1
-2
Solve for x
1
-2
-1
-6
Which variable would be the BEST choice to try and eliminate?
x
y
What does the new equation become after multiplying?
-12x + 6y = 26
-12x + 18y = 26
-12x + 18y = 78
What should we try and get the coefficients of y to be?
15 & -15
10 & -10
8 & -8
When using the elimination method to solve the system of equations 2x + 5y = 10 and 3x - 5y = 15, what is the resulting equation after the first step?
5x = 25
5x + 10y = 20
5x = 20
6x = 30
When using the elimination method to solve the system of equations 4x + 3y = 20 and 2x - 3y = 10, what is the resulting equation after the first step?
3x + 3y = 30
2x = 20
6x = 30
5x = 25
When applying the elimination method to the system of equations 5x - 2y = 10 and 10x + 2y = 40, what is the resulting equation after the first step?
15x = 50
5x = 15
15x + 4y = 50
10x = 30
A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
8x + 9y = −82
-x − 9y = 89
Add to eliminate x
Add to eliminate y
Subtract to eliminate x
Subtract to eliminate y
A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
8x + 9y = -24
-8x − y = 16
Add to eliminate x
Add to eliminate y
Subtract to eliminate x
Subtract to eliminate y
A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
4x + 9y = 1
4x − 7y = 11
Add to eliminate x
Add to eliminate y
Subtract to eliminate x
Subtract to eliminate y
A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
3x + 7y = 14
4x − 7y = 21
Add to eliminate x
Add to eliminate y
Subtract to eliminate x
Subtract to eliminate y
A variable needs to be eliminated to solve the system of equations below. Choose the correct first step.
-8x + 6y = 12
-8x − 7y = 1
Add to eliminate x
Add to eliminate y
Subtract to eliminate x
Subtract to eliminate y
4x+8y=20
-4x+2y=-30
(-7,1)
(2,-5)
(-2,5)
(7,-1)
−4x − 4y = 0
4x + 4y = 0
.10d + .05n = 80
d + n = 6.60
.10d + .05n = 6.60
.05d + .10n = 6.60
20x + 50y = 49
10x + 5y = 1430
20x + 50y = 1430
x + y = 1430
what do you need to multiply the top equation by to make a zero pair:
5x - 2y = 11
-10x + 3y = -4
5
-1
2
-2
Let's multiply the top equation by -2. What would be our new equation?
2x + 3y = 12
4x - 7y = - 54
4x - 6y = -24
-4x - 6y = 12
-4x - 6y = 24
-4x - 6y = -24
What is the solution to this system of equations?
4x + y = 6
x - 2y = 6
(2,-2)
(1,2)
( 1/2 , 4 )
(-2,2)
(2, 4)
Solve the system
2x + 3y = 6
x + 2y = 5
( 4 , -3 )
( -3 , 4 )
( 3 , 4 )
( 4 , 3 )
2x + 9y = -7
6x - 3y = 9
5x + 8y = -12
3x + 5y = -7
Solve the following system:
4x - 6y = -6
-2x -12y = -12
(0,1)
(1,0)
(1,1)
(2,1)
Solve the system:
2x + 9y = -7
6x - 3y = 9
(-1, -1)
(2,-1)
(1,1)
(1,-1)
Solve the system:
2x + 10y = -20
-x + 4y = 28
(-20,2)
(1,4)
(2,-20)
(-2,2)
Solve the following system:
5x + 4y = 1
10x + 6y = -6
(-3, 4)
(-3, -4)
(3, 4)
(4, -3)
(4, 3)
Would you add or subtract the equations to Eliminate a variable?
ADD
SUBTRACT
Use elimination to solve the system of equations.
WRITE YOUR SOLUTION AS AN ORDERED PAIR (x,y).
DO NOT WRITE ANY SPACES.
2x−3y=−6
−5x−9y=15
(a)
Use elimination to solve the system of equations.
WRITE YOUR SOLUTION AS AN ORDERED PAIR (x,y).
DO NOT WRITE ANY SPACES.
4x−9y=−11
−y+3x=9
(a)
10x − 7y = −18
Solve the following system by using elimination:
-2x - 5y = -15
x + 8y = 13
(5, 1)
(1, 5)
(5, -1)
4x + 2y = 44
x + y = 44
4x = y + 15
x - y = 15
Solve:
x + y = 55
x - y = 3
Oatmeal Cookies $3
Oatmeal Cookies $8
Oatmeal Cookies $6
Oatmeal Cookies $6
Bus 14
Bus 21
Bus 43
Bus 45
Child $5
Child $6
Child $16
Child $13
4x + 2y = 44
x + y = 44
4x = y + 15
x - y = 15
13.5x - 13y = 6
x - y = 6
3x + 7y = 13.5
3x - 7y = 13.5
3S + 4A = 1740
4S + 3A = 1740
3S + 4A = 530
4S + 3A = 530
Last season two running backs on the WCHS football team rushed a combined total of 1550 yards. One rushed 4 times as many yards as the other. Let x and y represent the number of yards each individual player rushed. Which system of equations could be used?
x + y = 1550
y = 4x
x + y = 1550
y = x + 4
y - x = 1550
y = 4x
y = 1550 + x
y = x + 4
At the Wayne County bookstore, Carla purchased a math textbook and a novel that cost a total of $54, not including tax. If the price of the math textbook, t, is $8 more than 3 times the price of the novel, n, which system of linear equations could be used to determine the price of each book?
t + n = 54
t = 3n + 8
t + n = 54
n = 3t + 8
t + n = 54
t = 3n - 8
t + n = 8
t = 3n + 54
Your family goes to Mississippi Fried for dinner. There are 6 people in your family. Some order the chicken fingers for $14.80, and some order the Deluxe Chicken Dinner for $17. If the total bill was $91, which system best represents the situation?
x + y = 6
14.80x + 17y = 91
x + y = 91
14.80x + 17y = 6
x + y = 6
14.80y + 17x = 91
x + y = 91
14.80x+ 17y = 6
1z = 0.75
3q + 1z = 0.75
q + z = 0.75
3q + 1z = 1.32
5c + 10d = 16.50
5c + 10d = 14.25
5c + 10d = 16.50
5c + 10d = 16.50
y=7.30+.90x
x + y = 7.30
y = 7.30 + .65x
y + .65x = 7.30
m: # of glasses of milk
m: Cost of each glass of milk
m: # of food items
m: Cost of each taco
t = 3n + 8
n = 3t + 8
t = 3n - 8
t = 3n + 54
x + y = 21
6x + 4y = 104
y = 4x
y = x + 4
y = 4x
y = x + 4
x + y = -2
y = 5
x - y = -10
x - y = -2
t = 3n + 8
n = 3t + 8
t = 3n - 8
t = 3n + 54
14.80x + 17y = 91
14.80x + 17y = 6
14.80y + 17x = 91
14.80x+ 17y = 6
20x + 50y = 49
10x + 5y = 1430
20x + 50y = 1430
x + y = 1430
20x + 50y = 49
10x + 5y = 1430
20x + 50y = 1430
x + y = 1430
1z = 0.75
3q + 1z = 0.75
q + z = 0.75
3q + 1z = 1.32
