Solving Algebraic Equations Using Substitution

What is the correct first step if you are solving this system by substitution?

• Substitute (x - 1) for the "y" in the top equation.

• Isolate the x in the bottom equation.

• Substitute the (x - 1) for the "x" in the top equation.

• You shouldn't be using substitution. This is set up for elimination.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Billy is solving this system by substitution. Which is the correct first step of his work?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Dana wants to solve the system using Substitution. Which is the correct first step?

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using substitution. y = 3x - 3 and -3x + y = -3

• (0, -3)

• infinitely many solutions

• no solution

Tags

CCSS.8.EE.C.8B

Solve the system of equations using substitution:

y = 7x + 9

2y + 2x = -18

• (6.75, 2.25)

• (2.25, 6.75)

• (-2.25, -6.75)

• (-2.25, 6.75)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using substitution. -3x + y = -5 and -4x - y = -16

• (3, -14)

• (5, -20)

• (3, 4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using substitution:

-4x + 4y = 8

y = -2x - 10

• (-4, -2)

• (12, -34)

• (4, -18)

• (-2, -6)

• (-4, 6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution method

x = 3

2x + 5y = 16

• (3,2)

• (3, 0)

• (2, 5)

• (2,10)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using substitution:
y = 2x + 5
2x + 2y = 4

• (1, 7)

• (7, 1)

• (2, 9)

• (-1, 3)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system of equations using substitution. y = -5x - 2 and y = -2x - 8

• (2, -12)

• (-2, 8)

• (2, 7)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6