Răspuns:
a) x+1=2
x=2-1
x=1
b)x-1=3
x=3+1
x=4
c)
2-x=7
x=2-7
x=-5
d)
3x=1
x=1÷3
x=0, (3)
e)3x-1=-2
3x=-1
x=-1÷3
x=-0, (3)
f)2x+3=-3
2x=-6
x=-3
