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AnastasiaDanchenko
@AnastasiaDanchenko
July 2022
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Раскрыть скобки, привести подобные.
а) 7*(5-2а)-(6+4а)
б) 0,4(3х-5а)-0,5*(7х-4а)
Уравнения.
А) 7,8у-3=5,3у+7
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Magnitogorskru
Verified answer
А) 7*(5-2а)-(6+4а)=35-14а-6-4а=29-18а;////б) 0,4(3х-5а)-0,5*(7х-4а)=1,2х-2а-3,5х+2а=-2,3х;/////Уравнения.А) 7,8у-3=5,3у+7;7,8у-5,3у=7+3;2,5у=10;У=10:2,5;У=4
2 votes
Thanks 1
AnastasiaDanchenko
Спасибо Вам большое)
Magnitogorskru
Не за что
93931
Verified answer
А) 7*(5-2а)-(6+4а) = 35-14а-6-4а = 29-18а.
б) 0,4*(3х-5а)-0,5*(7х-4а) = 1,2х-2а-3,5х+2а = - 2,3х.
А) 7,8у-3 = 5,3у+7
7,8у-5,3у = 7+3
2,5у=10
у=4
2 votes
Thanks 1
AnastasiaDanchenko
Спасибо)
Magnitogorskru
29-18а
Magnitogorskru
а не 11а
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Answers & Comments
Verified answer
А) 7*(5-2а)-(6+4а)=35-14а-6-4а=29-18а;////б) 0,4(3х-5а)-0,5*(7х-4а)=1,2х-2а-3,5х+2а=-2,3х;/////Уравнения.А) 7,8у-3=5,3у+7;7,8у-5,3у=7+3;2,5у=10;У=10:2,5;У=4Verified answer
А) 7*(5-2а)-(6+4а) = 35-14а-6-4а = 29-18а.б) 0,4*(3х-5а)-0,5*(7х-4а) = 1,2х-2а-3,5х+2а = - 2,3х.
А) 7,8у-3 = 5,3у+7
7,8у-5,3у = 7+3
2,5у=10
у=4