Question

a+b+c=345   a+25%a=b+50%b=c+20%c    Determinati numerele

Answer 1

a+ 25/100 *a = b+ 50/100 * b =c  + 20/100 * c

a+a/4 = b+b/2 = c+c/5   aducem la acelasi numitor

20a +5a = 20b +10b = 20c +4c

25a =30b = 24c  

a=30b/25= 6b/5

24c=30b

c=30b/24= 5b/4

a+b+c=345

6b/5 + b + 5b/4 =345   aducem la acelasi numitor

24b +20b+ 25b =6900

69b =6900

b=100

c=5*100/4=5*25= 125

a=6*100/5= 6*20=120