Question

one third of a number is less than the original by 10. find the number

Answer 1

let, the two numbers be x and x/3
=>x - x/3=10
=>3x - x/3=10
=>2x/3=10
=>2x=10×3
=>2x=30
=>x= 30/2
=>x= 15
therefore, the two numbers are :
x =15
and, x/3 = 15/3 =5

Answer 2

hola,

the process is in the picture.
x= -15