Substitution

Solve the system using substitution.
-7y + 5x = -3
x = 5y - 15

• (5,4)

• (4,5)

• No Solution

• Infinitely Many Solutions

Tags

CCSS.8.EE.C.8B

Solve the linear system using substitution. Your answer is an ordered pair (x, y).

• (1, 2)

• (2, 7)

• (3, 6)

• (-3, -6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

y = -x - 5
y = 3

• 8,1

• 2,3

• -2,2

• -8,3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

y = -x - 10
y = 4x

• 2,8

• -1,-8

• -2,-8

• 0,8

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.

• Make sure at least one equation is solved for one variable.

• Make sure both equations are in slope-intercept form.

• Make sure both equations can be solved.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

If x+y=14 and x-y=4 then the values of x and y are_________

• x=4 and y = 5

• x = 9 and y = 7

• x = -6 and y = 5

• x = 9 and y = 5

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

x = y - 2
4x + y = 2

• (2,0)

• (0,2)

• (0, -2)

• (-2,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in solving a system of linear equations by substitution?

• Rewrite each equation in the form y=mx+b

• Solve for x

• Check your answer

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which choice shows substitution correctly?

• 3x - (-6x +3) = 10

• 3(-6x + 3) - y = 10

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which choice shows substitution correctly?

• 3x - (-6x +3) = 10

• 3(-6x + 3) - y = 10

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6