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leshaqwerty
@leshaqwerty
August 2022
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помогите 5(х-4)=х+8, 9-7(х+3)=5-6х (7х+9)-(11х-7)=8 19,6+у=7(1,2-у) 0,4(6-4у)=0,5(7-3у)-1,9 помогите плизззззз
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slawa2003
А)5х-20=х+8
5х-х=20+8
4х=28
х=28:4
х=7
б)9-7х-21=5-6х
-7х+6х=5-9+21
-1х=17
х=17:-1
х=-17
в)7х+9-11х+7=8
-4х=8-7-9
-4х=-8
х=-8:-4
х=2
г)19,6+у=8,4-7у
у+7у=8,4-19,6
8у=-11,2
у=-11,2:8
у=-1,4
д)2,4-1,6у=3,5-1,5у-1,9
-1,6у+1,5у=3,5-1,9-2,4
-0,1у=-0,4
у=-0,4:0,1
у=4
1 votes
Thanks 1
leshaqwerty
спасибо!большое
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Report "помогите 5(х-4)=х+8, 9-7(х+3)=5-6х (7х+9)-(11х-7)=8 19,6+у=7(1,2-у) 0,4(6-4у)=0,..."
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Answers & Comments
5х-х=20+8
4х=28
х=28:4
х=7
б)9-7х-21=5-6х
-7х+6х=5-9+21
-1х=17
х=17:-1
х=-17
в)7х+9-11х+7=8
-4х=8-7-9
-4х=-8
х=-8:-4
х=2
г)19,6+у=8,4-7у
у+7у=8,4-19,6
8у=-11,2
у=-11,2:8
у=-1,4
д)2,4-1,6у=3,5-1,5у-1,9
-1,6у+1,5у=3,5-1,9-2,4
-0,1у=-0,4
у=-0,4:0,1
у=4