как решить 1)5у+7(3-у)=3(5-2у)-6 2)7у-4(3у+5)=2-3(4у-9). Created by srv008. matematika-ru

как решить 1)5у+7(3-у)=3(5-2у)-6 2)7у-4(3у+5)=2-3(4у-9)...

srv008 @srv008

August 2022 1 6 Report

как решить 1)5у+7(3-у)=3(5-2у)-6 2)7у-4(3у+5)=2-3(4у-9)

Answers & Comments

Dan2407

Verified answer

1)5у+7(3-у)=3(5-2у)-6
5у+21-7у=15-6у-6
5у-7у+6у=15-6-21
4у=-12
у=-12:4
у=-3

2)7у-4(3у+5)=2-3(4у-9)
7у-12у-20=2-12у+27
7у-12у+12у=2+27+20
7у=49
у=49:7
у=7

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