a)
2x-1=5
2x = 5+1
2x = 6
x = 6:2
x= 3
b)
-3 +2=11 ? - nu este necunoscuta
c)
7 -5x=2
-5x = 2 - 7
-5x = -5
x = -5 : - 5
x = 1
d)
-4x +3=-5
-4x = -5 - 3
-4x = - 8
x = -8 : -4
x = 2
e)
6x +9=-3
6x = -3 - 9
6x = -12
x = -12 : 6
x = -2
f)
-x +9 =11
-x = 11- 9
-x = 2
x = -2
