Răspuns:
a) 2x-1=9
2x=8
x=4
b) 12x-1=4x-65
8x=-64
x=-8
c) 15x+4=12x+6
3x=2
x=2/3
d) 5(x-1)+7(x-2)=5
5x-5+7x-14=5
12x-19=5
12x=24
x=2
e) x+3(2x-1)=3x+21
x+6x-3=3x+21
4x=24
x=6
f) 2(x-1)=5(x+5)
2x-2=5x+25
-3x=27
x=-9
g) 3x=5(3x+2)+26
3x=15x+10+26
-12x=36
x=-3
h) 3(2x-1)+2(x-1)=0
6x-3+2x-2=0
8x=5
x=5/8
i) 4(2x-1)+5(x-1)=10(2x+4)
8x-4+5x-5=20x+40
-7x=49
x=-7
j) 7(1-x)+6(2-3x)+3x=5(1-3x)
7-7x+12-18x+3x=5-15x
-10x=-14
x=10/14
si ultima se face asemanator, ai grija la calcule. Good luck!
