Решите уравнения.
1) 2х-15=3х-7                               
2) 7а-18=3а+22
3) 1/7*(7у-14)=9
4) 0,3х-17=-1,4х
5) 1/2х+1/3х=5/6
6) 3у+0,999=6у+0,999
7) 1,4в+2,5=0,4в-1,5
8) 18-5а=6а-15
9) 4*(х+1/2)=1/2*(2х-8)
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