Решите уравнения.3х-1=2(х-2)2. 3(х+5)=7-5х3.19(y-9)=3(y+7)

Question

Решите уравнения.
3х-1=2(х-2)
2. 3(х+5)=7-5х
3.19(y-9)=3(y+7)

Answer 1

№1
3х-1=2х-4
3х-2х=-4+1
х=-3
№2
3х+15=7-5х
3х+5х=7-15
8х=-8
х=-1
№3
19у-171=3у+21
19у-3у=21+171
16у=192
у=12

Answer 2

3х-1=2(х-2)
3х-1=2х-4
х=-3

3(х+5)=7-5х
3х+15=7-5х
8х=-8
х=-1

19(у-9)=3(у+7)
19у-171=3у+21
16у=192
у=12