Question

The sum of one eighth, one twelfth, and one twentieth parts of a number is 31, find the
number​

Answer 1

Step-by-step explanation:

So let that number = X

x/8+x/12+x/20=31

The LCM of the denominators is 120

15x/120+10x/120+6x/120=31

31x/120=31

31x=31 x 120

31x=3720

x=3720/31

x=120