Question

Решите уравнение:

1) 3 (x-1) -2 (x + 2) = 4x + 8;

2) 4 (x + 1,5) +3 (1-x) = 10;

3) 4 (3x + 2) -7 (x + 1) = 3 (x-1);

4) 2,5 (2x + 3) -2 (x + 2,5) = 3,5 + 2x.

Answer 1

3х-3-2х-4=4х+8

3х-2х-4х=8+3+4

-3х=15

х=-5

2) 4х+6+3-3х=10

4х-3х=10-6-3

х=1

3) 12х+8-7х-7=3х-3

12х-7х-3х= -3-8

2х=-11

х=5,5

4) 5х+7,5-2х-5=3,5+2х

5х-2х-2х=3,5-7,5+5

5х=9

х=1, 8