Question

4. The difference between twice a number and

half the number is 30. What is the number?
Help me please

Answer 1

20

Explanation:

let the number be n then twice the number is 2n and half the number is
`(1)/(2)` n

Then the difference is

2n -
`(1)/(2)` n = 30 ( multiply through by 2 to clear the fraction )

4n - n = 60, that is

3n = 60 ( divide both sides by 3 )

n = 20