Question

PLEASE HELP! If I add five to a mystery number and then multiply the result by two, I get twenty four. Write an equation to solve for the mystery number, solve the equation and then check your answer.

Answer 1

The mystery number is 7

Explanation:

This is a very easy problem.

let the mystery number=x

2(x+5)=24

2x+10=24

2x=24-10

2x=14

x=7

To check the answer,

Add 5 to 7=12, multiply by 2=24