Equations with fractions

x/9 = 8/12 I dont understand this or 1/4 x= 6

x/9 = 8/12
Write these fractions upright.
Now you need to get rid of the 9 on the left hand side so if you multiply by 9/1 it will cancel out.
If you multiply the left by 9/1 you have to multiply the right side by 9/1 as well.

x/9 * 9/1 = 8/12 * 9/1

x = 72/12

x = 6

The other one is similar , you will need to multiply both sides by 4

This you tube clip may help you.
I think you should look at it.

http://www.youtube.com/watch?v=vk4CP10bys0

For this answer I'll be using your first example: x/9 = 8/12

In the simplest terms, what the equation is saying is that x/9 is equal to 8/12. I'm assuming that the question is asking to find x, and I'll demonstrate the steps for that below.

With algebra, we do the inverse functions (i.e. multiply becomes divide, addition becomes subtraction, etc.) to find the unknown value, following inverse BEDMAS/BODMAS/BIDMAS/PEDMAS etc. etc. etc., and doing to one side what we do to the other From this, we can state that:

x/9 = 8/12
therefore
9(x/9) = 9*(8/12)
therefore
x = 9*(2/3)
therefore
x = 6