Question

Уравнение дробей !!

1) x + 2/5 - 3/7 = 8/35

SOS

Answer 1

$x+ frac{2}{5} - frac{3}{7} = frac{8}{35}$ 
$x+ frac{2*7}{5*7} - frac{3*5}{7*5} = frac{8}{35}$ 
$x+ frac{14-15}{35} = frac{8}{35}$ 
$x- frac{1}{35} = frac{8}{35}$  
$x= frac{9}{35}$ 

Ответ: х= $frac{9}{35}$