If five times a number plus two is 17, what is the number

The correct answer is three

Five times a number:

5*n

Five times a number plus two:

5*n + 2

Five times a number plus two is 17 (is means equals):

5*n + 2 = 17

Then solve for n.

Subtract each side by 2:

5*n = 15

Divide each side by 5:

n = 3

The number is 3.