Question

решите уравнение 
$7+ frac{x}{2} = frac{x+9}{5}$

Answer 1

$7+ frac{x}{2} = frac{x+9}{5} \ frac{70}{10} + frac{5x}{10} = frac{2x+18}{10} \ 70+5x=2x+18 \ 5x-2x=18-70 \ 3x=-52 \ x=- frac{52}{3}$