Question

When I think of a number, double it, then add seven, I get 25. what number did I think of?

Answer 1

9

Explanation:

25-7=18

half of 18 is 9

Answer 2

9

Explanation:

let the number be x

double it = x+x = 2x

then add seven = 2x+7

i get 25 2x+7= 25

subtract 7 from both sides

2x= 25-7= 18

2x= 18

x= 18/2 = 9