Răspuns :
Răspuns:
a) 3x+21=12
3x=-9
x=-9/3
x=-3
c) 15-10x=-10
-10x=-25
x=-25/-10
x=5/2
e) -2x=32
x=32/-2
x=-16
b) -2-9=-28
-11≠-28
Răspuns:
a) 3x+21=12
3x=-9
x=-9/3
x=-3
c) 15-10x=-10
-10x=-25
x=-25/-10
x=5/2
e) -2x=32
x=32/-2
x=-16
b) -2-9=-28
-11≠-28