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snega145145Jimkerri
@snega145145Jimkerri
July 2022
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Решите уравнения пожалуйста!!!
срочноо.
674. 7x+9(2+x)=-4x+3.
675. -x+4(7-x)=-7x+5.
676. X-3(1-7x)=2x+2.
677. -9x-9(4-x)=3x+3.
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Аня02468
7х+9(2+х)=-4х+3
7х+18+9х=-4х+3
7х+9х+4х=3-18
20х=-15
х=-15:20
х=-0,75
-х+4(7-х)=-7х+5
-х+28-4х=-7х+5
-х-4х+7х=-28+5
2х=-23
х=-23:2
х=-11,5
х-3(1-7х)=2х+2
х-3+21х=2х+2
х+21х-2х=3+2
20х=5
х=5:20
х=0,25
-9х-9(4-х)=3х+3
-9х-36+9х=3х+3
-9х+9х-3х=36+3
-3х=39
х=39:(-3)
х=-13
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Answers & Comments
7х+18+9х=-4х+3
7х+9х+4х=3-18
20х=-15
х=-15:20
х=-0,75
-х+4(7-х)=-7х+5
-х+28-4х=-7х+5
-х-4х+7х=-28+5
2х=-23
х=-23:2
х=-11,5
х-3(1-7х)=2х+2
х-3+21х=2х+2
х+21х-2х=3+2
20х=5
х=5:20
х=0,25
-9х-9(4-х)=3х+3
-9х-36+9х=3х+3
-9х+9х-3х=36+3
-3х=39
х=39:(-3)
х=-13