Solve By Elimination Quizzizz

 $-8x+y=20$  
   $4x-3y=5$  
What does the second equation need multiplied by so that the x's will eliminate?

• 2

• -1

• 4

• 0

Which variable will be eliminated?

• x

• y

Add the equations together.

• 18x = 6

• 2x = 4

• 4x = 4

• x = 5

Solve for x.

• x = 1

• x = 4

• x = 0

• x = -5

Which variable will be eliminated?

• x

• y

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Subtract the equations to eliminate y

• Multiply the second equation by 3.

• Multiply the first equation by 2

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Multiply the first equation by 2

• Multiply the second equation by 3

• Add the equations to eliminate x

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Multiply the first equation by 2

• Multiply the second equation by $-3$

• Add the equations to eliminate x

What is the best first step to solve this system by elimination?

• Add the equations to eliminate y

• Multiply the first equation by 2

• Multiply the second equation by 2

• Add the equations to eliminate x

The solution to a system of linear equations is ALWAYS...

• a fraction

• an ordered pair

• a decimal

• a negative number