Elimination Strategy

A variable needs to be eliminated to solve the system shown.  Choose the correct first step.

• add to eliminate y

• subtract to eliminate x

• subtract to eliminate y

• add to eliminate x

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

When you add the 2 equations shown together, what is the resulting equation?

• 4y = 48

• 8x + 4y = 48

• 8x = 48

• adding equations together isn't allowed in math

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

A variable needs to be eliminated to solve the system shown. Choose the correct first step.

• Add the equations to eliminate the x

• Add the equation to eliminate the y

• multiply the bottom equation by 2 to create opposite x's

• multiply the bottom equation by -2 to create opposite x's

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What should we multiply the 2 equations shown by if we want to eliminate the x's?

• a = 9 , b = -2

• a = 9 , b = 2

• a = -9 , b = 2

• You aren't allowed to multiply both equations by a number.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve this system by elimination

• (0,2)

• no solution

• (2,0)

Tags

CCSS.8.EE.C.8B