Решите пжл уравнение: 1) 4х+5(3-2х)=5-11х 2) 19-2(3х+8)=2х-37 3)8х+3(7-2х)=4х+3 4)...

Question

Решите пжл уравнение: 1) 4х+5(3-2х)=5-11х

2) 19-2(3х+8)=2х-37

3)8х+3(7-2х)=4х+3

4) 23-4(3х+8)=1-17х

Answer 1

1. 4х+5(3-2х)=5-11х

4х+15-10х=5-11х

4х-10х+11х=5-15

5х=-10

х=-10:5

х=-2

Ответ: -2

2. 19-2(3х+8)=2х-37

19-6х-16=2х-37

-3-6х=2х-37

-6х-2х=37+3

-8х=40

х=40:(-8)

х=5

3. 8х+3(7-2х)=4х+3

8х+21-6х=4х+3

2х+21=4х+3

2х-4х=3-21

-2х=-19

х=6,5

4. 23-4(3х+8)=1-17х

23-12х-32=1-17х

-9-12х=1-17х

17х-12х=9+1

5х=10

х=10:2

х=5