Question

Решите уравнения :1)4х+5(3-2х)=5-11;2)19-2(3х+8)=2х-37;3)8х+3(7-2х)=4х+3;4)23-4(3х+8)=1-17х.​

Answer 1

Ответ:

1) 4x+5(3-2x)=5-11

4x+15-10x=5-11

4x-10x=5-11-15

-6x=-21 /(-6)

x=3,5

2) 19-2(3x+8)=2x-37

19-6x-16=2x-37

-6x-2x=-37-19+16

-8x=-40 /(-8)

x=5

3) 8x+3(7-2x)=4x+3

8x+21-6x=4x+3

8x-6x-4x=3-21

-2x=-18 /(-2)

x=9

4) 23-4(3x+8)=1-17x

23-12x-32=1-17x

-12x+17x=1-23+32

5x=10 /5

x=2