Some simple equations I'm having problems with...

I'm having problems with these last three problems on my homework...

I found that they were too hard to type, so heres an image...



Thanks for any help.

To get you going; finish 'em :idea:

1st one: crisscross multiplication:
-4(3b - 2) = 2a(3a + 2)

2nd one: lcd the right side:
1/a = (b + c) / (bc)
crisscross multiplication:
a(b + c) = bc

3rd one: move the 2nd term, then lcd:
x^2 / r = (t - y^2) / t
crisscross multiplication:
r(t - y^2) = tx^2

Thanks! Had an ignasecond when I put the second one down, but decided to leave it there; I solved it by myself after I posted the first and second, just had to get started for the others.

Thanks again, great help, I'll remember to refer this to my friends who are also having some troubles.