Предмет: Математика, автор: Tagaevaerly

Помогите решить пример 4(0,8х-0,25y)-0,7(2x-3y),если x=0,2 , y= -0,6

Ответы

Автор ответа: tan4ik3107

4(0,8х-0,25y)-0,7(2x-3y)=
3,2х-1у-1,4х+2,1у=
1,8х+1,1у

1,8х+1,1у, при х=0,2; у=-0,6
1,8*0,2+1,1*(-0,6)= 0,36 - 0,66= - 0,3

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