Solving multi-step equations

Solve the following equation

 $5x+16=51$  

•  $x=7$  

•  $x=13.4$  

•  $x=30$  

•  $x=-7$  

Solve the following equation

 $8+\frac{3n}{12}=13$  

•  $n=10$  

•  $n=25$  

•  $n=20$  

•  $n=3$  

Solve the following equation

 $\frac{4b+8}{-2}=10$  

Solve the following equation

 $0=10y-40$