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2014-10-16T17:08:47+03:00
T + m + f = 96
     m + 8 = t
     f + 20 = m

t + m + f = 96
m = t - 8
f = m - 20

t + m + f = 96
m = t - 8
f = t - 8 - 20

t + t - 8 + t - 28 = 96
m = t - 8
f = t - 28

3t - 36 = 96
m = t - 8
f = t - 28

t = ( 96 + 36 ) supra 3
m = 44 - 8
f = 44 - 28

t = 44
m = 36
f = 16