Срочно! Пожалуйста решите уравнения подробно:
1) 2*(0.5х-3)=0
2) 7х*(х-1.8)=0
3) 2х+9=3х-1
4) х/3=4/5
5) 1/х=2/3
6) 0.1/0.5=Х/10
7) 0.2/0.3=0.4/х
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