If a number is added to the numerator of 13/43 and twice the number is added to the denominator of 13/43, the resulting fraction is equivalent to 1/3. Find the number.

Answer 1

(13 + n) / (43 + 2n) = 1 / 3

Multiply both sides by 3

Multply both sides by (43 + 2n)

Solve for n.