## anonymous one year ago Simplify : 325/x - 325/x+15

1. TheSmartOne

simplify 325/x - 325/x = ??

2. anonymous

yes ! I know that I need to find the LCD of x and x+15 but I dont remember how ...

3. TheSmartOne

oh you just multiply one fraction both numerator and denominator by x, and the other by (x+15)

4. anonymous

Could you please show me ?

5. anonymous

i would say they end up looking like this : 340/ x+15 - 325/ x+15

6. TheSmartOne

$$\huge\frac{325 (x+15)}{x(x+15)} - \frac{325(x)}{(x+15)(x)}=?$$

7. anonymous

Okay so what is he LCD ?

8. TheSmartOne

x(x+15)