Solving Systems by Substitution Easy

What is the solution to this system?
y = 2x + 1
y = 4x - 1

• (1,3)

• (-1,-3)

• (-1,3)

• (3,1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve: (Show work on your answer document.)

y=8x+1

y=6x+3

• (1, 9)

• (4, 14)

• (0, 1)

• (2, 4)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

y = 3x + 9
y = -6

• ( -7 , 6 )

• ( 1 , -6 )

• ( 7 , -6 )

• ( -5 , -6 )

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following systems of equations using substitution:

y = 8

y = -4x + 4

• (8, -1)

• (-28, 8)

• (-1, 8)

• (8, -28)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step of solving a system of equation by substitution?

• guess and check

• set the equations equal to each other

• Isolate one variable

• plug it in your calculator

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:
y = 8x + 2
y = -x - 7

• (1, 10)

• (-1, -6)

• (2, 7)

• (9, 9)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve:
y= 4x + 9
y = 5x + 10

• (-1, 5)

• (9, 19)

• (-1, -1)

• (9, 1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What does the graph of a system of equations with infinitely many solutions look like?

• 2 parallel lines

• 2 lines intersecting at one point

• 2 lines that are the exact same

• one single point

Tags

CCSS.8.EE.C.8A

Substitution method for solving systems of equations includes...

• two or more linear equations

• solving for one variable, then substituting the number into the other equation

• answers 1 and 2

• solving for only x, then using the number as the only solution for x and y

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

A system of equations that is dependent has...

• a consistent system

• infinite solutions

• two or more linear equations

• all of the above

Tags

CCSS.8.EE.C.8B