Răspuns:
a) 2(-×-1)=-8 b) 3(×+2)=6
-2×-2=-8 3×+6=6
-2×=-8+2 3×=6-6
-2×=-6 ×=0
×=3 ×nu apartine lui Z*
c) 4(2-×)=8 8-4×=8 -4×=8-8 ×=0 nu apartine lui Z*
d) 7: (×-1)=-1 7= -1(×-1) 7=-×+1 7-1=-× 6=-× x=-6
e)(×+2):4=0 ×+2=4 ×=2
f) (3-×):3=-1 (3-×)=-3 -×=-6 ×=6
g) 10:(×-1)=-5 -5(×-1)=10 -5×+5=10 -5×=10-5 -5×=5 ×=-1
h) -4:(1-×)=1 -4= 1-× -4-1=-× -5=-× ×=5
i) (2×-1):3=-1 2×-1=-3 2×=-3+1 2×=-2 ×=-1
j) (3×+1):2=-4 3×+1=-8 3×=-8-1 3×=-9 ×=-3
k)(4×+1):3=3 4×+1=9 4×=9-1 4×=8 ×=2
l) 2(-3×+1)=-4 -6×+2=-4 -6×=-4-2 -6×=-6 ×=1
