Question

The sum of two numbers is 13 and the difference is 5.
Whats the answer?

Answer 1

Answer: the first number is 9, the second is 4

Explanation:

let n = 1st number

let n-5 = 2nd number

n+(n-5)=13

collect like terms: 2n-5=13

add 5 to both sides

2n=18

divide both sides by 2

n=9

n-5=4