Răspuns:
m.a( a;b;c) =72 => a+b+c= 72*3=216
b=a+50% din a =[tex]\frac{100a}{100}[/tex] +[tex]\frac{50a}{100}[/tex]=[tex]\frac{150a}{100}[/tex]=1,5a
c=b+[tex]\frac{b}{3}[/tex] =[tex]\frac{4b}{3}[/tex]
a+b+c=216 <=> a+1,5a+[tex]\frac{4}{3} *1,5 a[/tex]=216|*10
10a+15a+[tex]\frac{4}{3}[/tex]*15a=2160
<=> 45a=2160 => a=2160:45= 48 => b=72 =>c=96
