Solve the equation for x

by Eric
(Florham Park, NJ)

(x+13)/y = 9

Multiply both sides of the equation by y


y×(x + 13)/y = 9 × y

Simplify

x + 13 = 9y

Minus 13 from both sides of the equation


x + 13 - 13 = 9y - 13

x + 0 = 9y - 13

x = 9y - 13