7(х+3)-2 (х-5)=8;-х-5,2=12-2(х+0,6)-10​

Решение и ответ:

7(x + 3) - 2(x - 5) = 8

7x + 21 - 2x + 10 = 8

5x + 31 = 8

5x = 8 - 31

5x = -23

x = -23 ÷ 5

x = -4.6

-х - 5.2 = 12 - 2(x + 0.6) - 10​

-x - 5.2 = 12 - 2x - 1.2 - 10

-x - 5.2 = -2x + 0.8

-x + 2x = 0.8 + 5.2

x = 6