Solve Systems by Substitution Setting Equal to Each Other

^{What is the solution?} 

• 1

• -2

• (1, 2)

• (1, -1)

Tags

CCSS.8.EE.C.8B

Solve for x and y by setting both equations equal to each other and then solve for x.  Once you get x, go back and get y using one of the original equations.
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 for x and y ( use graphing or substitution)
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 this system of equations ( Use the substitution method)
2x+y=9
y=5x+2

• (1,7)

• (2,5)

• (-1,-3)

• (5,-1)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system of equations (Use the substitution method)
y=3x-2
y-3x=4

• (1,1)

• (-2,4)

• They are the same line

• They never cross (no solution)

Tags

CCSS.8.EE.C.8B

Solve this system of equations(Use graphing or substitution method)
y=8x-5
y=2x+19

• (1,3)

• (2.4, 23.8)

• (2.5,15)

• (4,27)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system of equations (substitution might be the best tool)
2x+y=27
y=-11x

• (2, -22)

• (-2, 22)

• (3, -33)

• (-3, 33)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve for x and y
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 by substitution: y=3x+14
y=-4x

• y=3

• y=1

• y=2

• y=4

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The ordered pair that satisfies BOTH equations in the system is called the _____________________

• system of equations

• function

• graph

• solution 

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6