Question

решить уравнение 2/3-х= 1/5

Answer 1

-х=1/5-2/3
-х=-7/15
х=7/15

Answer 2

$\frac{2}{3} -x = \frac{1}{5} \\ x = \frac{2}{3} - \frac{1}{5} \\ x = \frac{10}{15} - \frac{3}{15} \\ x = \frac{7}{15}$