упростите выражение 4х+3у-(6х+7у)+(3х-6у) и найдите значение при х=-3, у=5.03
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4х+3у-6х-7у+3х-6у= х-10у
-3-10*5.03=-60.3
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4х+3у-6х-7у+3х-6у= х-10у
-3-10*5.03=-60.3