Question

A certain number is subtracted from 20. the result multiplied by 3 is equal to 45. what is the number?

Answer 1

the correct number is 15

Answer 2

Let the number is x
so 20-x=20-x
now 3×(20-x)=45
60-3x=45
-3x=45-60
-3x=-15
x=-15/-3
x=5
So the required number is5