Răspuns:
a).8X+1-5X-5=0
3X-4=0
X=-4/3
b).-4X+2X☆+10-10=0
-2X=0,X=0
c). 3X-4X=9-5
-X=4 împărțim prin -1
X=-4
d).2X+2=6
2X=6-2
2X=4,
X=4/2=2
e).5X-5=2X+7
5X-2X=7-5
3X=2
X=2/3
f).3X+6=2X+8
3X-2X=8-6
X=2
g).6=(4X+4)-2X-4
6=4X+4-2X-4
6=2X
X=6/2,X=3
h).4=5X+5-6
4=5X-1
4+1=5X
X=5/5,X=1
i).6X-15=6X-6-9
6X-6X=15-6-9
6X-6X=15-15
0=0