Question

3. Решите уравнения: 1) 14-2-(3x-5)=4-(2x-1); 2)-3-(5-2x) +2.(x-1)=5-3x; 3) 2 (3x-5)-4x=x+2.(x-1); 4) 7-3x+2.(2x+4)= 3x -4.​

Answer 1

Пошаговое объяснение:

14 - 2 - (3х - 5) = 4 - (2х - 1)

14 - 2 - 3х + 5 = 4 - 2х + 1

17 - 3х = 5 - 2х

-3х + 2х = 5 - 17

-х = -12

х = 12

-3 - (5 - 2х) + 2(х - 1) = 5 - 3х

-3 - 5 + 2х + 2х - 2 = 5 - 3х

-10 + 4х = 5 - 3х

4х + 3х = 5 + 10

7х = 15

х = 15/7

х = 2 1/7

2(3х - 5) - 4х = х + 2(х - 1)

6х - 10 - 4х = х + 2х - 2

2х - 10 = 3х - 2

2х - 3х = -2 + 10

-х = 8

х = -8

7 - 3х + 2(2х + 4) = 3х - 4

7 - 3х + 4х + 8 = 3х - 4

х + 15 = 3х - 4

х - 3х = -4 - 15

-2х = -19

х = -19 : (-2)

х = 9,5