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2014-10-07T16:05:29+03:00
A+b=9
c=3
ac+bc=c(a+b)=3x9=27

a=16
b+c=25
 ab+ac=a(b+c)=16x25=400
2a+3b+3c=2x16+3(b+c)=32+3x25=32+75=107
2 4 2