1)-3*(1.2х-2)-(4-4.6х)+6*(0.2х-1)=-3.6х+6-4+4.6х+1.2х-6=2.2х-4
(22/10)*(-15/22)-4=-1.5-4=-5.5
2) 0.9х-(0.7х+0.6у)=0.9х-0.7х-0.6у=-0.2*(3у-х)=-0.2*9=-1.8
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1)-3*(1.2х-2)-(4-4.6х)+6*(0.2х-1)=-3.6х+6-4+4.6х+1.2х-6=2.2х-4
(22/10)*(-15/22)-4=-1.5-4=-5.5
2) 0.9х-(0.7х+0.6у)=0.9х-0.7х-0.6у=-0.2*(3у-х)=-0.2*9=-1.8