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popbkru
@popbkru
June 2022
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Помогите с 9 и 10 уравнением . Пожалуйста , очень надо .
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ryazanova1952
9). 8(7х-4)+(2х-5)= -39, 56х-32+2х-5=-39, 58х=32+5-39=37-39, 58х=-2, х=-2/58, х=-1/29
10). 4/5(х+2 1/2)=2/3(2х-5), 4/5х+5/2*4/5=4/3х-10/3, 4/5х+2=4/3х-10/3,
4/5х-4/3х=-10/3-2, х(4/5-4/3)=-10/3-6/3,
32/15х=-16/3, х=-16/3:32/15, х=-5/2=-2 1/2
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Answers & Comments
10). 4/5(х+2 1/2)=2/3(2х-5), 4/5х+5/2*4/5=4/3х-10/3, 4/5х+2=4/3х-10/3,
4/5х-4/3х=-10/3-2, х(4/5-4/3)=-10/3-6/3,
32/15х=-16/3, х=-16/3:32/15, х=-5/2=-2 1/2