Solving Two-Step Eqautions Skill Check

Solve for x.

 $3x\ -\ 5\ =\ 16$  

•  $x=\ \frac{11}{3}$  

•  $x\ =\ 7$  

•  $x\ =\ -\frac{11}{3\ }$  

•  $x\ =\ -7$  

Tags

CCSS.7.EE.B.4A

Solve for x.

 $\frac{x}{3}\ +\ 9\ =\ 15$  

•  $x\ =\ 54$  

•  $x\ =\ 36$  

•  $x\ =\ 72$  

•  $x\ =\ 18$  

Tags

CCSS.7.EE.B.4A

Solve for n.

 $1\ -\ 11n\ =\ 67$  

Tags

CCSS.7.EE.B.4A

Solve for n.

 $\frac{n}{5}\ +\ 2\ =\ 6$  

Tags

CCSS.7.EE.B.4A

Amanda solved this equation using the following steps to find the value of z. Is she correct in the way she did so? Why or why not?

 $36\ =\ -15z\ +\ 6$  

 $36\ +\ \left(-6\right)\ =\ -15z\ +\ 6\ +\ \left(-6\right)$  
 $\frac{30}{-15}\ =\ \frac{-15z}{-15}$  
 $z\ =\ -2$  

Tags

CCSS.HSA.REI.A.1

Bonus Question 

(Remember "Trying can only help you, not hurt you" so try your best)

Solve for x.

 $\frac{x\ -\ 7}{-3}\ =\ 4$  

•  $x\ =\ 5$  

•  $x\ =\ -19$  

•  $x\ =\ -5$  

•  $x\ =\ -33$  

Tags

CCSS.7.EE.B.4A