Question

Решите уравнение $4- \frac{x}{7}= \frac{x}{9}$

Answer 1

$4= \frac{x}{9}+ \frac{x}{7}$

$4= \frac{16}{63} x$

$x= \frac{4}{ \frac{16}{63}}$

$x=15 \frac{3}{4}=15,75$