No. 5 caranya gimana?

5/3 = 15/x
3×15 = 5×x
45 = 5x
45/5 = x
9 = x

[tex]5 = 3 \\ 15 = x \\ 5x = 45 \\ x = 45 \div 5 \\ x = 9[/tex]
jadi banyak coklat yg diperlukan 9..
semoga bermanfaat