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kozari4ka
@kozari4ka
July 2022
1
18
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Помогите решить пожалуйста!!!!!
1) -0.6x-1.2x+3.2x-5.6x если х=3.5
2) -2.7x+3.6y+4.5x-5.8y если х= -1(целая)1,9(дробью) ,у= - 1,4(дробью)
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ndusha
Verified answer
1.
-0.6x-1.2x+3.2x-5.6x = -4,2х
при х=3,5
-4,2х=-4,2*3,5=-14,7
2.
-2.7x+3.6y+4.5x-5.8y =1,8х-2,2у =1 8/10х-2 2/10у=1 4/5х-2 1/5у=9/5х-11/5у
при
х= -1 1/9=-10/9
у= - 1/4
9/5х-11/5у=9/5*(-10/9)-11/5*(1/4)=-90/45-11/20=-2-11/20= -2 11/20
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Answers & Comments
Verified answer
1.-0.6x-1.2x+3.2x-5.6x = -4,2х
при х=3,5
-4,2х=-4,2*3,5=-14,7
2.
-2.7x+3.6y+4.5x-5.8y =1,8х-2,2у =1 8/10х-2 2/10у=1 4/5х-2 1/5у=9/5х-11/5у
при х= -1 1/9=-10/9
у= - 1/4
9/5х-11/5у=9/5*(-10/9)-11/5*(1/4)=-90/45-11/20=-2-11/20= -2 11/20