12-2(x-3y)=x+y+2 1.2x+0.7y+1.4=0

12-2х+6у=х+у+21,2х+0,7у+1,4=012-2х+6у-х-у-2=01,2х+0,7у+1,4=010+5у=3х0,4(10+5у)+1,4=010+5у=3х4+5у+1,4=010+5у=3х5у=-5,410+5у=3ху=-1,0810-5,4=3ху=-1,083х=4,6у=-1,08х=1,53у=-1,08