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impartiti numarul 288 in parti direct proportionale cu numerele 7:11 si 18

Răspuns :

a+b+c=288
a,b,c,  direct proportional cu 7,11,18

a/7=b/11=c/18=k
a=7k
b=11k
c=18k

7k+11k+18k=288
36k=288
k=8

a=56
b=88
c=144