3 - (1/5)x = -7
Easily done if you make your variable a whole number.
(1/5) * 5 = 1
So multiply your whole equation by 5.
5 * (3 - (1/5)x = -7)
15 - x = -35
Get the variable by itself by subtracting 15 from both sides leaving:
-x = -50
Multiply the equation by (-1) or simply take away the negatives on both sides. (Same difference in this situation)
x = 50
