Question

If you double a number then add 28 you get 4/9 of the original number. What is the original number?

Answer 1

let's x be your number, then:
2x+28=4/9 x
solve it for x, please

Answer 2

I get -108/7

Answer 3

And I know it's wrong.

Answer 4

2x-4/9x=-28
(18-4)/9 x=-28
14x=-28 * 8
x=-252/14
x=-18

Answer 5

do you see when you made a mistake?
fractions....?

Answer 6

Fractions confuse the hell out of me.

Answer 7

just remember that when you + or "-" you need common denominator...
you do not need to worry about it when you multiply or divide.
keep doing exercises - it's helps to get use to it :)
Good Luck!