The sum of eighteen and five times a number is the same as twice the number

Answer 1

"a number": x

"the sum of eighteen and five": 18 + 5

"the sum of eighteen and five times a number": 18 + 5 * x

"... is the same as twice the number": ... = 2 * x

"the sum of eighteen and five times a number is the same as twice the number": 18 + 5 * x = 2 * x

So we solve for x.

18 + 5 * x = 2 * x

-18 -18

5 * x = 2 * x - 18

- 2 * x -2 * x

3 * x = 18

/ 3 / 3

x = 6

So, our final answer is "the number is 6".