Verified answer

Ответ:

Пошаговое объяснение:

a)

13 + 5x = 8 - 2x

5x + 2x = 8 - 13

7x = -5

x = -5/7

б)

15x - 8(3x - 4) = 14

15x - 24x + 32 = 14

-9x + 32 = 14

9x = 32 - 14

9x = 18

x = 18 : 9

x = 2

в) (3x-7)/4 - 2x/3 = (x+4)/2    |*12

3(3x-7) - 4*2x = 6(x+4)

9x - 21 - 8x = 6x + 24

x - 21 = 6x + 24

6x - x = -21 - 24

5x = -45

x = -45 : 5

x = -9