Odpowiedź :
a) -3+2x-6=3-4x
-9 + 2x = 3 - 4x
2x + 4x = 3 + 9
6x = 12
x = 2
b) 7x+2=5+3x+9
7x + 2 = 3x + 14
7x - 3x = 14 - 2
4x = 12
x = 3
c) -5x+12+x=2x-12
-4x + 12 = 2x - 12
-4x - 2x = -12 - 12
-6x = -24
x = 4
d) 2x-6+12-3x=5
-x + 6 = 5
-x = 5 - 6
-x = -1
x = 1
e) 3x-12-4x+10=-4
-x - 2 = -4
-x = -4 + 2
-x = -2
x = 2
f) 2x+8-5-15=2
2x - 12 =2
2x = 2 + 12
2x = 14
x = 7
g) -2x-6+8x+12=-6
-2x + 8 + 12 = 0
6x + 12 = 0
6x = -12
x = -2