Question

Я вас умоляю помогите даю 35 балов

Answer 1

1.

$3 \frac{5}{6}-4 \frac{1}{5} x =- 2\frac{7}{12}\\ \frac{23}{6}-\frac{21}{5} x =-\frac{31}{12}\\230-252x =- 155\\252x =385\\x =\frac{55}{36} =1\frac{19}{36}$

2.

$\frac{3}{4} x =-\frac{1}{2}\\ x =-\frac{1}{2}\div\frac{3}{4}\\ x =-\frac{1}{2}\times \frac{4}{3}\\x=-\frac{2}{3}$

3.

$5 \frac{2}{3} x - 12 =-2.5\\5 \frac{2}{3} x =9.5 \\ \frac{17}{3} x = 9.5\:\:| \times 3 \\ 17x =28.5 \\ x =\frac{57}{34}=1 \frac{23}{34}$

4.

$7 \frac{2}{5}x+15 =-5 \frac{2}{10}\\ \frac{37}{5}x+15 =-\frac{52}{10}\\74x + 150 =- 52 \\ 74x =-202 \\ x =-\frac{202}{74}=-2 \frac{54}{74}$