Odpowiedź:
1. 4x+5=6x-9 | -6x
-2x+5=-9 | -5
-2x = -14 | : (-2)
x = 7
2. 8+2(x-3)=6(x-1)
8+2x-6=6x-6
2x+2=6x-6 | -2x
2=4x-6 | +6
8=4x | :4
x=2
3. 3-2(9+2x)=-x
3-18-4x=-x
-15-4x=-x |+4x
-15=3x | :3
x=-5
4. (x+2)/3 -6 = 2x - (x+7)/6 | x6
2(x+2)-36=12x-x-7
2x+2-36=11x-7
2x-34=11x-7 | -2x
-34=9x-7 | +7
-27 = 9x | :9
x = -3
