一個數的三分之一比他的五分之二少4,這個數的十二分之五是多少

題目：

一個數的三分之一比他的五分之二少4,這個數的十二分之五是多少
……越快越好………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………會的高手速度…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………不會邊去…………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………急………………………………………………………………………………………………………………………………………………………………不多說……………………………………………………………………………………………………………………………………………………………………

解答：

4÷（2/5-1/3）X5/12=4÷1/15*5/12=4*15*5/12=25