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2014-10-18T18:17:23+03:00
A+b+c=152
a=3b+15
c=b-8
3b+15+b+b-8=152
5b+7=152
5b=152-7
5b=145
b=145:5
b=29

a=3b+15
a=3*29+15
a=102

c=29-8
c=21

102+29+21=152
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