Solving Systems of Equations by Substituting or Eliminating

Fill in the blank: The substitution method is a way to solve systems of equations by ________________ equations within one another.

• graphing

• eliminating

• substituting

• solving

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the best choice for solving the given system?

• Solve both equations for x.

• Plug in 4x-1 for y in the second equation.

• Plug in 4x-1 for x in the second equation.

• Plug in 2x-5 for x in the first equation.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

T-Rob is solving the system shown. What is the solution?

• (-1, 3)

• (3, -1)

• There is no solution.

• There are infinitely many solutions.

Tags

CCSS.8.EE.C.8B

Angel must solve the system shown. Which first step is the best choice?

• Solve the equation on the right for y.

• Solve the equation on the left for x.

• Solve the equation on the left for y.

• Solve the equation on the right for x.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

x + 2y = -4
x - 2y = 8

• (2,5)

• (2,-3)

• (2,-2)

• (-3,2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve for x and y.
y = 2/3x - 2
y = -x + 3

• (0,3)

• (0,-3)

• (3,0)

• (-3,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Lukie is solving the system shown. What is the best choice for his next step?

• Plug in -2x-2 for x in the equation on the right.

• Plug in -8 for y in the equation on the left.

• Plug in 5x+3y for y in the equation on the left.

• Plug in -2x-2 for y in the equation on the right.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system below using the substitution method.

3x + 2y = 16

7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system using the substitution method.

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which is the best method for solving this system?
y = 3x - 11
4x + 8y = 6

• Elimination

• Graphing

• Substitution

• Factoring

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6