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2014-07-16T23:32:36+03:00
A:b=0,75

0,75= 75/100= 3/4

a:b=3/4

a=3/4*b

a=3b/4

a+b=56

3b/4 +b=56

3b+4b=224
7b=224
b=32

a=3*32/4
a=3*8
a=24
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