Linear equations (two variables)

A system of equations is shown below.
3x + 6 = 4y
3x − 2y = 0
What is the x-value in the solution to the system?

Mathematical Equivalence

ON

Solve the following systems using inverse matrices.

3x + y = 5

5x + 2y = 9

• (1, 2)

• (2, 1)

• (0, 0)

• (1, 1)

Solve the system using matrices.

• A

• B

• C

• D

Solve the System of Equations using Augmented Matrices.

-3x +3y = 27

x + 2y = 3

• (5,-4)

• (5,4)

• (-5,4)

• (-5,-4)

Find the solution of the system given:

3x - y = 7

2x + y = 3

• (-1,2)
• (5,4)
• (4,5)
• (2,-1)

Solve the system using elimination. If y = 4, then what is the value of "x"?
 $-x\ +\ 3y\ =\ 13$  
 $x\ +\ y\ =\ 3$  

• x = 1
  

• x = 3
  

• x = -1
  

• x = -3
  

• x=-4

• y=0

• y=-4

• x=0

• x=4

Solve the system.

2x + y = 3 and 4x + 4y = 8

3x + y = –21
x + y = –5
 
Answer:
x = –8
y = 3 

• True
• False

SOLVE FOR THE FIRST VARIABLE:

y = 2x + 1

2x + 2y = 20

• x = 2

• x =1

• x = 3

• x = 4