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


x + 13 = 9y

Minus 13 from both sides of the equation

x + 13 - 13 = 9y - 13

x + 0 = 9y - 13

x = 9y - 13

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