Question

Помогите 527(3) очень надо

Answer 1

$\frac{7x}{9}-\frac{3x}{4} = \frac{5}{12} \\\frac{28x}{36} - \frac{27x}{36} =\frac{15}{36} \\\frac{x}{36} = \frac{15}{36} \\x = 15$

Ответ: х = 15