Question

Решите уравнение 8/7(х+14)-4/3(х-9)=15

Answer 1

$frac{8}{7} (x+14)- frac{4}{3} (x-9)=15$
$frac{8x}{7} +16- frac{4x}{3} +12=15$
$frac{24x}{21} - frac{28x}{21} =15-16-12$
$- frac{4x}{21} =-13$
-4х=-13*21
-4х=-273
х=273:4
х=68,25