Question

One number is 7 more than another number, and their sum is 23. Find the numbers.

Answer 1

8 and 15

Explanation:

let one number be n then the other number is n + 7

their sum is 23 , then

n + n + 7 = 23

2n + 7 = 23 ( subtract 7 from both sides )

2n + 7 - 7 = 23 - 7 ( simplify )

2n = 16 ( divide both sides by 2 )

`(2)/(2)` n =
`(16)/(2)` , that is

n = 8

and n + 7 = 8 + 7 = 15

the two numbers are 8 and 15