#5.2 Solving Systems of Linear Equations by Substitution

To solve the system by substitution, which variable would you get alone first?

• x in the top equation

• x in the bottom equation

• y in the top equation

• y in the bottom equation

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

To solve the system by substitution, which variable would you get alone first?

• x in the top equation

• x in the bottom equation

• y in the top equation

• y in the bottom equation

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

To solve the system what should go in the parentheses?

 $y=-2x-9$  

 $6x-5y=-19$  

•  $-2x-9$  

•  $6x+19$  

•  $\frac{\left(y+9\right)}{2}$  

•  $5x$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

To solve the system what should go in the parentheses?

 $-x+y=3$  

 $3x+y=-1$  

•  $3x+1$  

•  $-1-3x$  

•  $x-3$  

•  $x+3$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Which system has the solution (1, 4) ?

• $x+y=4$

  $x-y=4$
  

• $x+y=5$
  $x-y=-3$
  

• $x+y=3$
  $x-y=4$
  

Tags

CCSS.HSA.REI.C.9

A test is worth 100 points and has 36 questions. Multiple Choice are 2 points and Short Answer are 6 points. Which system could be used to solve this problem?

• $m+s=100$
  $2m+6s=36$
  

• $m=s+36$
  $s=m+100$
  

• $m+s=36$

  $2m+6s=100$
  

• $ms=36$
  $12ms=100$
  

Tags

CCSS.8.EE.C.8C

A theater earns $3640 from a show. They sold 148 premium tickets and 76 regular tickets. A premium ticket costs 3 times as much as a regular ticket. Which system can be used to find the price of each ticket?

•  $P=3R$ 
   $148P+76R=3640$ 
  

•  $148P=3640$ 
   $76R=3640$ 
  

•  $P+R=3640$ 

   $148P+76R=100$ 
  

•  $R=3P$ 
   $76P+148R=3640$ 
  

Tags

CCSS.HSA.CED.A.3

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

• 
  

  Substitute $y$  in the first equation with $12-3x$  

• Solve the second equation for  $x$  

• Substitute  $x$  in the first equation with  $12-3x$  

• Solve the first equation for  $x$  

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution.

• $\left(1,5\right)$

• $\left(2,6\right)$
  

• $\left(3,4\right)$

• $\left(10,5\right)$

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

Solve the system by substitution.

• $\left(0,0\right)$

• $\left(2,19\right)$

• $\left(-2,3\right)$
  

• $\left(1,-1\right)$

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6