Ответ:
а)(3х+5)+(8х+1)=17
3х+5+8х+1=17
11х=-5-1+17
11х=11
х=11/11
х=1
б)19-5(3х-1)=9
19-15х+5=9
15х=-19-5+9
15х=-15
х=-15/15
х=-1
в)7х-4=х-16
7х-х=4-16
6х=-12
х=-12/6
х=-2
г)13-5х=8-2х
-5х+2х=-13+8
-3х=-5
х=-5/-3
д)3у-(5-у)=11
3у-5+у=11
3у+у=5+11
4у=16
у=16/4
у=4
е)(8х+11)-13=9х-5
8х+11-13=9х-5
8х-9х=-11+13-5
-х=-3
ж)30+5(х-1)=35х-25
30+5х-5=35х-25
5х-35х=-30+5-25
-30х=-50
х=-50/-30
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Ответ:
а)(3х+5)+(8х+1)=17
3х+5+8х+1=17
11х=-5-1+17
11х=11
х=11/11
х=1
б)19-5(3х-1)=9
19-15х+5=9
15х=-19-5+9
15х=-15
х=-15/15
х=-1
в)7х-4=х-16
7х-х=4-16
6х=-12
х=-12/6
х=-2
г)13-5х=8-2х
-5х+2х=-13+8
-3х=-5
х=-5/-3
д)3у-(5-у)=11
3у-5+у=11
3у+у=5+11
4у=16
у=16/4
у=4
е)(8х+11)-13=9х-5
8х+11-13=9х-5
8х-9х=-11+13-5
-х=-3
ж)30+5(х-1)=35х-25
30+5х-5=35х-25
5х-35х=-30+5-25
-30х=-50
х=-50/-30