Răspuns :
Explicație pas cu pas:
5x-84=106 / +84
5x = 190 /:5
x = 38
188 - 2x = 98 / +2x
188 = 98 +2x /-98
90 = 2x / :2
x = 45
5x-84=106 188-2x=98
5x=106+84 -2x=98-188
5x=190 -2x=-90
x=190:5 x=90:2
x=38 x=45
5x=106+84 -2x=98-188
5x=190 -2x=-90
x=190:5 x=90:2
x=38 x=45