Question

3,5*x+4,80+2*x=4,79
...................................................................................................................

Answer 1

3,5x+4,80+2x=4,49
5,5x=4,79-4,80
5,5x=-0,01
x=-0,01:5,5
x=-1/550
Ответ: -1/550

Answer 2

◕‿◕◕‿◕** решение во вложении **.◕‿◕◕‿◕