Răspuns :
Răspuns:
a) 3x-8=x+10
3x-x=10+8
2x=18
x=18/2=9
b) 4x– 5= x + 7
4x+x=7+5
3x=12
x=12/3=4
c) 6x –12 = 3x +15
6x -3x=15+12
3x=27
x=27/3=9
d) 8x - 7= x +14
8x - x =14+7
7x =21
x21/7=3
e) 6x + 9 =8x -11
6x - 8x= - 11 -9
- 2x = -20
x = 10
f) 9x +8 = 7x - 4
9x - 7x= -4 -8
2x = -12
x=-6
g) 4x-12=2x +14
4x -2 x =14+12
2x= 26
x=26/2=13
h) 7x +16 = 3x -12
7x -3x =-16 -12
4x =-28
x=-7
i) 15x -25= 5x + 15
15x -5x =25+15
10 x =40
x 40/10=4