a+b+c= 94; ax1,2= bx0,9= cx1,5; ax 12/10= bx9/10= cx15/10 , se simplifica si rezulta 12a= 9b= 15c , a/(1/12)= b/(1/9) ='c/(1/15) =( a+b+c)/( 1/12+ 1/9+ 1/15) = 94/( 47/180) = 94x 180/47= 2x 180 = 360 , deci 12a= 360 , a= 360:12= 30; 9b = 360 , b = 360:9 = 40; 15c = 360, c = 24;