Răspuns:
A = {x|x € Z, 3x = 6} ={ 2}
3x=6
x=2
C = {x|x e Z, -2x = 10} = { - 5}
-2x=10 /:(-2)
x=-5
E = {x|x€ Z, X - 7 = 3}= {10 }
x-7=3
x=10
G= {x|x€ Z, -7x = 5x}= { - 5/7}
-7x=5x /:(-7)
x= - 5/7
B={x|x € Z,-7x=0} ={0}
-7x=0 /:(-7)
x=0
D= {x|x € Z,-x-5=0}= {-5}
-x-5=0
-x=5 :/(-1)
x=-5
F= {x|x € Z,3(x+1)=3x+3}={ 0, 1}
3(x+1)=3x+3
3x+3=3x+3
0=0
SAU
3(x+1)=3x+3
3(x+1)=3(x+1) /:3
x+1=x+1 /-1
x=x
H= {x|x € Z,2(x+1)=2x-5}={0}
2(x+1)=2x-5
2x+2=2x-5
0x=-7
x=0
Explicație pas cu pas: