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2014-03-31T21:01:04+03:00
A+b=85
a:b=8 rest 4⇒a=8b+4
8b+4+b=85
9b+4=85
9b=85-4
9b=81
b=81:9
b=9
a=8*9 +4
a=72+4
a=76
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