Решите хотяб одно уравнение))))пожалуста

1)4*(3-х) -11=7*(2х-5)

2)0,9*(4у-2)=0,5*(3у-4)+4,4

3)4*(1-0,5)=-2*(3=2а)

4)1/2*(4-3   1/2х)=1    1/4х-1/2

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