Răspuns :
Răspuns:
a)3x+7=10
3x=10-7=3
x=1.
b)2x+4=-4
2x=-4-4=-8
x=-8÷2=-4
c)2x/-5=-20
2x=-20×-5=100
x=100÷2=50
d)x/-8=7
x=7×(-8)=-56
a) 3x + 7=10
3x=10-7
3x=3
x=1
b) 2x + 4= -4
2x= -4 - 4
2x= -8
x= -4
c) 2x:(-5)= -20
-2/5x= -20
x=50
d) x:(-8)=7
-1/8x=7
x= -56
e) [x]=5
x-5=5-5
x-5=0
3x=10-7
3x=3
x=1
b) 2x + 4= -4
2x= -4 - 4
2x= -8
x= -4
c) 2x:(-5)= -20
-2/5x= -20
x=50
d) x:(-8)=7
-1/8x=7
x= -56
e) [x]=5
x-5=5-5
x-5=0