# I hate fractions..

• Jan 23rd 2008, 12:15 PM
eh501
I hate fractions..
Someone help me with this question..

What is the value of x in the equation? $\displaystyle x/2x+1=4/3$

How would i start off?

and btw how do i do a fraction sign on this site?
• Jan 23rd 2008, 12:41 PM
colby2152
Quote:

Originally Posted by eh501
Someone help me with this question..

What is the value of x in the equation? $\displaystyle x/2x+1=4/3$

How would i start off?

and btw how do i do a fraction sign on this site?

I think all of us have hated fractions once upon a time...

$\displaystyle \frac{x}{2x+1}=\frac{4}{3}$

Multiply each side by the denominators:

$\displaystyle 3x=8x+4$

$\displaystyle x=\frac{-4}{5}$

Good question: (Star)(Star)(Star)

As far as the fraction sign is concerned: x=\frac{-4}{5} is the final line of code there. This may help you: http://omega.albany.edu:8008/Symbols.html
• Jan 23rd 2008, 12:44 PM
eh501
When you say "Multiply each side by the denominators" do you mean cross multiply? I dont know if you were taught like that.
• Jan 23rd 2008, 02:35 PM
topsquark
Quote:

Originally Posted by eh501
When you say "Multiply each side by the denominators" do you mean cross multiply? I dont know if you were taught like that.

It means to multiply both sides by 3 and by 2x + 1. But you can cross multiply if you prefer.

-Dan