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2014-11-14T20:11:26+02:00
4x+7=x-3 
4X-X=-3-7=-10
3X=-10
X=-10/3

3(2x+1)=5x-2
6X+3=5X-2
6X-5X=-5
X=-5
2(x-4)-7=3(1-x)-15
2X-8-7=3-3X-15
5X=3
X=3/5
4x+7=x-3
4X-X=-3-7=-10
3X=-10
X=-10/3

3(2x+1)=5x-2
6X+3=5X-2
6X-5X=-5
X=-5
2(x-4)-7=3(1-x)-15
2X-8-7=3-3X-15
5X=3
X=3/5