Question

Solve for x. 13(x - 3) = 39 x = 1 x = 4 x = 6 x = 10

Answer 1

13x - 3(13)=39
13x - 39 = 39
so you would have to add 39 to both sides
13x=78
than divide the whole equation by 13.
so 13 divided by 78 is 6
so in the case the answer would be 6
Hope this helps. 
Good luck

Answer 2

First you need to distribute. This is what you do.

13(x - 3) = 39
13x - 39 = 39
Add 39 to both sides to isolate the variable.
13x = 78
Now divide.
x = 6
I hope this helps love! :)