Question

20% din suma Paulei reprezintă 30% din suma pe care o are Carmen. Impreuna cele doua au 100lei. Ce suma are fiecare?

Answer 1

fie X suma Paulei
Y suma lui Carmen
20/100 ×X =30/100× X
X/5=3Y/10
X=15Y/10
15Y/10+Y=100
X=15Y/10
15Y+10Y=1000
X=15Y/10
15Y=1000
X=15Y/10
Y=1000/25
X=15Y/10
Y=40suma Paulei
X=15×40/10
Y=40
X=60suma lui Carmen