M÷5/11=-1 7/15; x÷1 1/7=-7/9; 1/3x-1=15-x: Математика

Ответ:

$m \div \frac{5}{11} = - 1 \frac{7}{15} \\ m = - 1 \frac{7}{15} \times \frac{5}{11} = - \frac{22}{15} \times \frac{5}{11}$

$m = - \frac{2}{3}$

$x \div 1 \frac{1}{7} = - \frac{7}{9} \\ x = - \frac{7}{9} \times 1 \frac{1}{7} = - \frac{7}{9} \times \frac{8}{7}$

$x = - \frac{8}{9}$

$\frac{1}{3} x - 1 - 15 + x = 0 \\ 1 \frac{1}{3} x - 16 = 0 \\ 1 \frac{1}{3} x = 0 + 16$

$1 \frac{1}{3} x = 16 \\ x = 16 \div 1 \frac{1}{3} = 16 \times \frac{3}{4}$

$x = 12$

Отвечаем правильно