12у-0,024=0,204 0,9х+47=1919
12у=0,204+0,024 0,9х=1919-47
12у=0,228 0,9х=1872
у=0,228/12 х=1872/0,9
у=0,019 х=2080
5y+7y-0.024=0.204 2.4x-1.5x+47=1919
12y-0.024=0.204 0.9x+47=1919
12y=0.204+0.024 0.9x=1919-47
12y=0.228 0.9x=1872
y=0.228/12 x=1872/0.9
y=0.019 x=2080
