Double a number, decreased by nine, twenty five

Question

What does the equation look like?

Answer 1

Double a number, decreased by nine equals twenty-five.

You write the following equation 2n - 9 = 25.

Answer 2

I assume you mean "...is twenty-five" at the end? If so, then:

Let x = number

Double a number ⇒ 2x (double or twice a number both mean to multiply by 2)

Double a number decreased by nine ⇒ 2x - 9

Double a number decreased by nine is twenty-five ⇒ 2x - 9 = 25 (The word "is" translates to "=")

Hope this helps.

Mr. K