Respuesta :

STEPS:

1) Add 99 to both sides (get rid of 99 on the left side);

           7w = 517+99
           7w = 616

2) Divide both sides by 7 (get rid of 7 on the left side):

            w = 616/7
            w= 88

So w=88 is the answer.
altavistard
You want to isolate w.  To do this, add 99 to both sides, which will give you

7w = 517 + 99 = 616.

Then divide both sides by 7:  7w/7 = 616/7 = 88 (answer)