Помогите решить уровнения,плиз!!
1)3х+7=28
2)4х-11=5
3)-2х+15=3х+6
4)4(х+2)=8
5)2,1 (2х-4)=63
ПОМОГИТЕ ПОЖАЛУЙТСА,ДАЮ 20 БАЛЛОВ
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