(-0,7х0,6у)5-3(0,4у-1,5х)=-3,5х3у-1,2у+4,5х=4,5х-1,2у-3,5х3у
(-0.7x 0.6y)5-3(0.4y-1.5x)=-3,5х*3у-1,2у+4,5х=4,5х-10,5ху-1,2у
(-0,7х0,6у)5-3(0,4у-1,5х)=-3,5х3у-1,2у+4,5х=4,5х-1,2у-3,5х3у
(-0.7x 0.6y)5-3(0.4y-1.5x)=-3,5х*3у-1,2у+4,5х=4,5х-10,5ху-1,2у