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2014-11-14T20:03:16+02:00
2x+7=x+32
2x-x=32-7
x=25

3x+8=x+48
3x=48-8
x=40:3
x=13 r 1

4x+5=x+68
3x=68-5
3x=63
x=63:3
x=21

25-3x=17-x
25-17=3x-x
8=2x
x=4

5x+7=23+x
4x=23-7
x=16:4
x=4

6x+10=2x+50
4x=40
x=40:4
x=10
5 4 5