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Problema de algebra!!!!!!!!!!!

Problema De Algebra class=

Răspuns :

a)2a/3=3b/5=5c/4=k
a=3k/2
b=5k/3
c=4k/5
3k/2 + 5k/3 + 4k/5 = 1
Numitorul comun este 30.
45k+50k+24k=30
119k=30 =>k=30/119
=>a=45/119
=>b=50/119
=>c=24/119