874 решите уравнение. Created by RSL1. matematika-ru

874 решите уравнение...

dhehbdhd 1)4x+15-10x=5-11x
4x+15-10x-5+11x=0
5x+10=0
5x=-10
x=-2

1 votes Thanks 2

тто 1) 4х+5 (3-2х)=5-11х
4х+15-10х=5-11х
-6х+11х=5-15
5х=-10
х=-2

2)19-2 (3х+8)=2х-37
19-6х-16=2х-37
3-6х=2х-37
-6х-2х=-37-3
-8х=-40
х=5

3)8х+3 (7-2х)=4х+3
8х+21-6х=4х+3
2х-4х=3-21
-2х=-18
х=9

4) 23-4 (3х+8)=-1-17х
23-12х-32=1-17х
-9-12х=1-17х
-12х+17х=1+9
5х=10
х=2

3 votes Thanks 9

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