Hi Sky,
Perhaps you're needing help translating the word problem into an algebraic equation that you can solve.
If that's the case, let's take it one phrase at a time.
"Twice a number" means 2 times a number, or simply doubling a number. We don't know what that number is yet so we can pick any letter to represent that unknown value...let's use "N" which will stand for missing number. So twice a number just means "2N".
Next it says "added to 3." That simply means it will be 3 plus whatever we just had before, which was 2N.
So now we're at "3 + 2N".
Then it says "divided by the number plus 9." This means whatever we had before will be divided by our missing number "N" plus 9. This part is a little tricky because some people will not realize the number plus 9 is together in the division. So now our problem is a fraction that looks like this:
(3 + 2N)/(N + 9)
The last part says "the result is three halves." That means whatever we had previously will be set equal to three divided by two (or 1.5 if you'd like to use the decimal value). So our final equation is:
(3 + 2N)/(N + 9) = 3/2
Solve that for "N" and you're done. If you're having trouble doing the solving part as well, realize that you need to get rid of the fractions first. You can either multiply both sides by the denominator, or even cross multiply if that's easier for you. Don't forget to check your answer by plugging it in. Good luck.
