Question

Найдите корень уравнений

Answer 1

16)
$- frac{2x}{5} = - 7 frac{1}{5} \ frac{2x}{5} = frac{36}{5} \ 2x = 36 \ x = frac{36}{2} = 18$
17)
$frac{3x}{8} = 7 frac{1}{2} \ frac{3x}{8} = frac{15}{2} \ frac{3x}{8} = frac{60}{8} \ 3x = 60 \ x = frac{60}{3} = 20$
18)
$- frac{3x}{4} = - 6 frac{3}{4} \ frac{3x}{4} = frac{27}{4} \ 3x = 27 \ x = frac{27}{3} = 9$
19)
$- frac{5x}{6} = - 18 frac{1}{3} \ frac{5x}{6} = frac{55}{3} \ frac{5x}{6} = frac{110}{6} \ 5x = 110 \ x = frac{110}{5} = 22$