Răspuns :
a+b+c=717
b=3a
b=c-10
c-10=3a
c=3a+10
a+3a+3a+10=717
7a+10=717
7a=717-10
7a=707
a=707:7
a=101☺
b=3a
b=3×101
b=303☺
101+303+c=717
c=717-(101+303)
c=313☺
V: 101+303+313=717
b=3a
b=c-10
c-10=3a
c=3a+10
a+3a+3a+10=717
7a+10=717
7a=717-10
7a=707
a=707:7
a=101☺
b=3a
b=3×101
b=303☺
101+303+c=717
c=717-(101+303)
c=313☺
V: 101+303+313=717
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