Question

Determinati nr.nat x si y astfel incat fractiile urmatoare sa fie echivalente 2/5, x+2/15 și 10/3y+1

Answer 1

2/5=(x+2)/15=10/(3y+1)
2/5=(x+2)/15
5(x+2)=15*2=30
5x=30-10=20
x=4
2/5=10/(3y+1)
50=2(3y+1)
6y=50-2=48
y=8

Answer 2

2×15=5×x=>x=30/5=6
2(3y+1)=5×10=>6y+2=50=>y=48/6=8