(5,8x-40,1)• (-2,4)=(3,2x-23,9)•0,8

-13,92х + 96,24 = 2,56х - 19,12

-13,92х - 2,56х = -19,12 - 96,24

-16,48х = -115,36

х = -115,36 : (-16,48)

х = 7

-13.92x+96.24=2.56x-19.12
-13.92x-2.56x=-19.12-96.24
-16.48x=-115.36
x=-115.36:(-16.48)
x=7