1.Упростите выражения:
а)2(3х+4у)-3(2х-у)
б)3(2х+у)-2(4х-3у)-4(х-у)
2.Решите уравнения:
а)0,9х+1=0,2х-6
б)0,5(8х-3)=-4(2,5-х)
в)3(2х-1)-2(х-3)=5(х-2)
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