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)
$- \frac{5x}{6} = - 18 \frac{1}{3} \\ \frac{5x}{6} = \frac{55}{3} \\ \frac{5x}{6} = \frac{110}{6} \\ 5x = 110 \\ x = \frac{110}{5} = 22$