Question

ПЖЖЖЖЖЖЖЖЖЖЖ МНЕ НЕ КТО НЕ ПОМОГАЕТ
2 и 4 задание СРОЧНО!!!!!!

Answer 1

2.

a) $3.4x = -19.38$

$x=-19.38:3.4$

$x=-5.7$

Ответ: - 5.7.

б) $(x+\frac{16}{41} )*\frac{1}{9} =-1\frac{1}{9}$

$\frac{1}{9}x+\frac{16}{369}=-1\frac{1}{9}$

$\frac{1}{9}x=-1\frac{41}{369}-\frac{16}{369}$

$\frac{1}{9}x=-1\frac{19}{123}$

$x=-1\frac{19}{123}:\frac{1}{9}$

$x=-\frac{142*9}{123*1} =-\frac{142*3}{41}$

$x=-\frac{426}{41} =-10\frac{16}{41}$

Ответ: $-10\frac{16}{41}$.

3.

$(-3.4-6.1)*1\frac{6}{19} +(1\frac{41}{42} -2\frac{10}{42}):1\frac{4}{7} =$

1) $-3.4-6.1=-9.5$

2) $1\frac{41}{42} -2\frac{10}{42}=-\frac{11}{42}$

3) $-9.5*1\frac{6}{19} =-\frac{5*5}{2*1} =-\frac{25}{2} =-12.5$

4) $-\frac{11}{42} :1\frac{4}{7}=-\frac{1*1}{6*1} = -\frac{1}{6}$

5) $-12\frac{3}{6} -\frac{1}{6} =-12\frac{2}{3}$

Ответ: $-12\frac{2}{3}$.

Удачи!!!