решите уравнение 1) 5-2х=4 2) 6х-9=2х+3 3) 7-(3х+2)=-4х. Created by zziyod. algebra-ru

решите уравнение 1) 5-2х=4 2) 6х-9=2х+3 3) 7-(3х+2)=-4х...

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решите уравнение 1) 5-2х=4 2) 6х-9=2х+3 3) 7-(3х+2)=-4х

Answers & Comments

JosephGoebbels 1) 5-2x=4
-2x=4-5
-2x=-1 |*(-1)
2x=1
x=1/2

2) 6x-9=2x+3
6x-2x=3+9
4x=12
x=12/4
x=3

3) 7-(3x+2)=-4x
7-3x-2=-4x
-3x+4x=2-7
x= -5.

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