Решите уравнение,разделив его обе части на 2:а)3(х+5)=90б)2(х-6)=-34в)-2(х+12)=6х. Created by menshikovavlad. algebra-ru

Решите уравнение,разделив его обе части на 2:а)3(х+5)=90б)2(х-6)=-34в)-2(х+12)=6...

AidanaOmarbekova97 А) х =25
3х+15=90
3х=90-15
3х=75
х= 25
Б)х=-23
В) х=-

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Лерах А)3(х+5)=90
3х+15=90 /2
1,5х+7,5=45
1,5х=-7,5+45
1,5х=37,5
х=25

б)2(х-6)=-34
2х-12=-34 /2
х-6=17
х=6+(-17)
х=-11

в)-2(х+12)=6х
-2х-24=6х /2
-х-12=3х
-3х-х=12
-4х=12
х=-3

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