Question

1) - 7(2-3x) =56;
2)x-8/x+2=7/3;
3)-9(6x+1)=-45(2x+2,6).
ПОЖАЛУЙСТА​

Answer 1

Ответ:

Пошаговое объяснение:

1) -7(2 - 3x) = 56

-14 + 21x = 56

21x = 56 + 14

21x = 70

x = 70 / 21 = 10 / 3

x = 3 1/3

2) x - 8 / x + 2 = 7 / 3

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

3x - 24 = 7x + 14

3x - 7x = 14 + 24

-4x = 38

x = 38 / -4 = - 19 / 2

x = -9 1/2

3) -9(6x + 1) = -45(2x + 2,6)

-54x - 9 = -90x - 117

-54x + 90x = -117 + 9

36x = -108

x = -108 / 36

x = -3