Systems of Linear Equations by Substitution

Solve by Substitution: y=3x+14 y=-4x

• (2,-8)

• (-14,56)

• (-2,8)

• (8,-2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What graph is created when there are infinitely many solutions?

• Parallel lines

• Lines that intersect

• Same line

• Parabola

Tags

CCSS.8.EE.C.8A

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

True or false: a solution to a system of linear equations is in the form of an ordered pair.

• True

• False

Tags

CCSS.HSA.REI.C.9

Solve by Substitution:

y = -6

-3x - 6y = 24

• (6, 6)

• (6, -6)

• (4, -6)

• (-6, 4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

x - 3y = -13
4x + 2y = 4

• (1, 4)

• (-1, -4)

• (-1, 4)

• (1, -4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What point is a solution to the system of equations below?

3x + 2y = 16

7x + y = 19

• (-2,5)

• (-2,-5)

• (2,-5)

• (2,5)

How many solutions does a system of linear equations have where the lines intersect?

• No solution

• One solution

• Infinitely many solutions

• Two solutions

Tags

CCSS.8.EE.C.8B

Solve using Substitution
y = -1x - 5
4x - 8y = 4

• (-3, -2)

• (5, -7)

• (3, 9)

• (-5, 4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve using Substitution:
6x + 2y = -20
y = -2x - 4

• (-5, -14)

• (1, 6)

• (-6, 8)

• (2, -8)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6