1)29x-317=0
29x=317
x=317/29
x=10,93
2) 311x=268x+516
311x-268x=516
43x=516
x=516/43
x=12
3)312x+326=284+522
312x+326=806
312x=48
x=480/312
x=1.53
4) 37x+37=4(8x+13)
37x+37=32x+52
37x-32x=52-37
5x=15
x=15/5
x=3
5) 843x+964=729x+1876
843x-729x=1876-964
114x=912
x=912/114
x=8
6)3(x-15)=35-x
3x-45+35-x
3x+x=35+45
4x=80
x=20
7)357x-412=195x+230
357x-195x=412+230
162x=642
x=3,96
8) 20x+6=15x+2(x+3)
20x+6=15x+2x+6
20x-17x=6-6
3x=0
x=0
9)2(2x-1)=2x+3
4x-4=2x+3
4x-2x=3+4
2x=7
x=3,5