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Автор - RoseLou

Решите уравнение

а) -7х+5(2х-3)=6 ;
б) 5х-7(3-х)=2х+11 ;
в) 0,3-2(х+1)=0,4х+0,1 ;
г) 6х-3,2=7х-3(2х-2,5) .

Ответ

Автор - Аня856
а) -7х+5(2х-3)=6
-7х+10х-15=6
-7х+10х=6+15
3х=21
х=21/3
х=7
б)5х-7(3-х)=2х+11
5х-21+7х=2х+11
5х+7х-2х=11+21
10х=32
х=32/10
х=3,2

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