anonymous 3 years ago (4x)/(x+2)+(3)/(x-1)=(15)/(x^2+3x-4) help please?

1. anonymous

$\frac{ 4x }{ x+2}+\frac{ 3 }{ x-1 }=\frac{ 15 }{ x ^{2}+3x-4}$

2. anonymous

add the two fractions on the LEFT then cross multiply...

3. anonymous

wait....but there's a equal sign between them though?

4. anonymous

yeah... when you have equal proportions you can do that... for example: $$\huge \frac{a}{b}=\frac{c}{d}$$ cross multiplying yields: $$\huge a\cdot d = b \cdot c$$

5. anonymous

oh okay thankyou(: i got it<3

6. anonymous

yw...:)