Помогите решить уровнения....
1)3x-1=2(x-2)
2)3(x+5)=7-5x
3)0.5x-7=-2.3x
4)6y-5.7=2.5y
1)3x-1=2(x-2)
2)3(x+5)=7-5x
3)0.5x-7=-2.3x
4)6y-5.7=2.5y
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Answers & Comments
3х-1=2х-4
3х-2х=-4+1
х=-3
2)3(х+5)=7-5х
3х+15=7-5х
3х+5х=7-15
8х=-8
х=-1
3)0.5х-7=-2.3х
0.5х+2.3х=7
2.8х=7
х=7\2.8
х=0.25
4) 6y-5.7=2.5y
6у-2.5у=5.7
3.5у=5.7
у=5.7\3.5
у=1.6