Can I pleaseeeeee get some help with some math? I'll post a link to the first question below.

Question

anonymous · Answer

http://gyazo.com/00293db4925b1c41cb1305f9845eb742

anonymous · Answer

I don't know how, sorry.

anonymous · Answer

The parallel lines make the two triangles similar. The sides are split proportionally.

You could say
$$\frac{9}{4x-2}=\frac{12}{3x+2}$$
and use the properties of proportions to solve it. (namely, cross products property)

anonymous · Answer

Okay..I think I got that, how would I use the properties of proportions?? Like, how would I solve it?

anonymous · Answer

The cross products property says that for the proportion $$\frac{a}{b}=\frac{c}{d}$$ the "cross-products" are equal. That is, a*d (the first cross product) = b*c (the other cross product).This can be done equally as easily with elementary algebra, but this property simplifies it.

For a/b=c/d, ad=bc. Plug in the a, b, c, and d values from your homework and you can solve it like any other equation.

anonymous · Answer

Uh.
I guess I got it, thanks.

anonymous · Answer

Maybe sometime you can help me do it. Cause I still can't, even though I slightly understand what you mean.
I just. Can't. Im horrible at math. It looks like soup to me.

anonymous · Answer

I have got to go to bed. I'll reply to anything in the morning.

whpalmer4 · Answer

$$9(3x+2) = 12(4x-2)$$use distributive property:
$$9*3x + 9*2 = 12*4x - 12*2$$$$27x+18=48x-24$$

anonymous · Answer

Again, thank you very much!!! Both of you.

whpalmer4 · Answer

Now subtract 27x from both sides, and add 24 to both sides