Ответ:
3(12-3у)-4(3у-11)=12*2
36-9у-12у+44=24
-21у=24-36-44
21у=56
у=56/21
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Ответ:
3(12-3у)-4(3у-11)=12*2
36-9у-12у+44=24
-21у=24-36-44
21у=56
у=56/21