Question

Срочно!!!!
Помогите!!!

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Answer 1

а) 2 (2х - 3) + 7х - 13 + 3 ( 5 - 2х) = 6х - 6

4х - 6 + 7х - 13 + 15 - 6х = 6х - 6

5х + 2 = 6х

5х - 6х = - 2

- х = - 2

х = 2

б) 4 ( х - 2) + 5 ( 2х - 5) + 4х - 1 = 80 - 20х

4х - 8 + 10х - 25 + 4х - 1 = 80 - 20х

18х - 34 = 80 - 20х

18х + 20х = 80 + 34

38х = 114

х = 3