Question

Sa se determine a,b,c invers proportionale cu 0,(3) ; 0,5 si 0,25 , stiind ca 6a + 2b - 5c = 100.

Answer 1

a=9/3=3k
b=10/5=2k
c=100/25=4k
6*3k+2*2k-5*4k=100
18k+4k-20k=100
2k=100
k=100/2
k=50
a=3*50
a=150
b=2*50=100
c=4*50
c=200
6*150+2*100-5*200=900+200-1000=1100-1000=100