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2014-10-26T18:47:40+02:00
A / b = 3 si rest 2
a-17 = b+15
a= 3b+2
3b+2-17=b+15
2b = 30
b =15
a= 3 * 15 +2 = 47
2014-10-26T19:01:49+02:00
A:b=3rest2
a-17=b+15
a=3xb+2
3b+2-17=b+15
2b=17+15-2
2b=30
b=30:2
b=15
a=3xb+2
a=45+2
a=47