PRACTICE: Solving Systems by Substitution

Solve the system.

• (-8,2)

• (8,-2)

• (-2,-8)

• (-8,-2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system.

• Infinite Solutions

• (-1,6)

• (-6,7)

• (7,-6)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system.

• Infinite Solutions

• (-8,-6)

• (-6,-8)

• (1,-2)

Tags

CCSS.8.EE.C.8B

Solve the system.

• (8,-1)

• (-7,-7)

• (1,8)

• (1,0)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the first step in solving a system by Substitution?

• Make sure both equations are in standard form.
• Make sure at least one equation is solved for one variable.
• Make sure both equations are in slope-intercept form.
• Make sure both equations can be solved.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)
• (1, -2)
• (-2, 1)
• (-1, -2)

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the following system:

 $-7x-2y=-13$  

 $x=2y+11$  

•  $\left(3,\ -4\right)$  

•  $\left(3,\ 4\right)$  

•  $\left(-3,\ -4\right)$  

•  $\left(-3,\ 4\right)$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6