Răspunsuri

2014-07-24T10:16:23+03:00
A+b=38

b+c=36

a+c=44

2a+2b+2c=38+36+44

2(a+b+c)=118

a+b+c=59

c=59-38
c=21

a=59-36
a=23

b=59-44
b=15
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Cel mai inteligent răspuns!
2014-07-24T10:18:53+03:00
A, b, c - numerele naturale
a+b+c=?


a+b=38 
b+c=36 => b=36-c
a+c=44 => a=44-c

a+b=38
44-c+36-c=38
80-2c=38
80-38=2c
42=2c
c=42:2
c=21

si stim ca a+b=38
c=21, deci
a+b+c= 38+21=59

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