Solving Systems of Elimination and Substitution

Is (1,10) a solution to

y=7x+5

y=x+9

• yes

• no

What is the best method to use?

−4x − 2y = −12

4x + 8y = −24

• Substitution

• Elimination

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

How many solutions will this system have? 

• No solution

• One Solution

• I Don't Know

• Infinitely Many Solutions

Tags

CCSS.8.EE.C.8A

y = 2x + 1
3x + y = 16

• x = 3

• (2, 7)

• (3, 5)

• (3, 7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

y = 3x - 1
2x + 2y = 22

• (2, 5)

• (3, 8)

• (4, 11)

• (5, 14)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

y = 3x + 2
y - 3x = 2

• no solution

• infinite solutions

• (0 , 0)

• (2 , 2)

Tags

CCSS.8.EE.C.8B

Solve by elimination:
-9x-4y=-20

5x+4y=4

• (-4,4)

• (4,4)

• (4,-4)

• (-4,-4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by elimination.

7x - y = -10

-7x + 5y = -6

• (-2, -4)

• (-2, -1)

• (-4, -1)

• (6, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to this system of equations? Solve by substitution or graphing.

• (7, -8)

• (-7, 8)

• (-7, -8)

• (7, 8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the solution to this system? Solve by substitution.
y= 4x + 3
2x - 3y = 21

• (3,-9)

• (-3,-9)

• (-3,9)

• (0,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6