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  • Utilizator Brainly
2014-09-28T19:52:50+03:00
A+b+c=55
b=c+5
a=3b⇒a=3*(c+5)=>a=3c+15

3c+15+c+5+c=55
5c+20=55
5c=35
c=35:5
c=7

b=c+5
b=7+5
c=12

a=3c+15
a=3*7+15
a=36
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