6 (x+0,5)-3=9
6x+3-3=9
6x=9
x=3/2
x=1,5
8x-15=6x-3
8x-6x-15=-3
8x-6x=-3+15
2x=-3+15
2x=12
x=6
7 (3x+1)-11x=2
21x+7-11x=2
10x+7=2
10x=2-7
10x=-5
x=-1/2
2x-4/7=0
2x=4/7
x=2/7
29-13x=17-3x
29-13x+3x=17
-13x+3x=17-29
-10x=17-29
-10x=-12
x=6/5
7x-18=3x+22
7x-3x-18=22
7x-3x=22+18
4x=22+18
4x=40
x=10
18+(45-y)=58
18+45-y=58
63-y=58
-y=58-63
-y=-5
17-(x+20)=-8
17-x-20=-8
-3-x=-8
-x=-8+3
-x=-5
x=5
y=5
6 (x-3)=1-2 (x+2)
6x-18=1-2 (x+2)
6x-18=1-2x-4
6x-18=-3-x
6x+2x-18=-3
6x+2x=-3+18
8x-3+18
8x=15
x=15/8
5x-5=10+4 (x+2)
5x-5=10+4x+8
5x-5=18+4x
5x-4x-5=18
5x-4x=18 +5
x=18 +5
x=23