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dmitrieva2003bk
@dmitrieva2003bk
October 2021
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решите плиз уравнения.. буду очень благодарна
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ismailovamadina
А) сначала общий знаменатель 18
3(х-2)\18 + 9х\18=2(5х-2)\18
3х-6+9х=10х-4
3х+9х-10х=6-4
2х=2
х=2\2
х=1
б)общий знаменатель 30
10(5+2х)\30=6(х-3)\30+15(х+5)\30
50+20х=6х-18+15х+75
20х-6х-15х=75-18-50
-1х=7
х=-7
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Answers & Comments
3(х-2)\18 + 9х\18=2(5х-2)\18
3х-6+9х=10х-4
3х+9х-10х=6-4
2х=2
х=2\2
х=1
б)общий знаменатель 30
10(5+2х)\30=6(х-3)\30+15(х+5)\30
50+20х=6х-18+15х+75
20х-6х-15х=75-18-50
-1х=7
х=-7