Question

3y+9y=192 write the solution set.

Answer 1

3 y + 9 y = 192 

192/12 = 16

x = 16

Answer 2

3 y + 9 y = 192 

First, start off by adding your two number-variables: 

12y = 192 

Then, divide 12 by 192: 

y = 16
Your answer should be 16. 
Hopefully that helped! :)