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2010-01-12T17:21:19+01:00
5d+2=3d
2=3d-5d
2=-2d
d=-1

6e-2=7e+5
-2-5=7e-6e
-7=e
e=-7

6f-1=f+2
6f-f=2+1
5f=3 /:5
f=3/5
2010-01-12T17:23:37+01:00
5d+2=3d
2d = -2
d= -1

6e-2=7e+5
-1e = 7
e= -7

6f-1=f+2
5f = 3
f = 3/5
2010-01-12T19:15:06+01:00
5d+2=3d
5d-3d=-2
2d=-2
d=-1

6e-2=7e+5
6e-7e=5+2
-e=7
e=-7

6f-1=f+2
6f-f=2+1
5f=3
f=3/5
f=0,6