Răspuns:
a. 3x-x=2+7
x=9/2
2x=9 (A)
b. 2=7x-x
2=6x
x=6/2=>x=3
6x=-2 (F)
c. 11=x+4x
11=5x =>x=11/5
-5x=11 (F)
d. 2x=6-4
2x=2=>x=1
x+2=3 (F)
