I was showing how you did that one right and the first one wrong. You didn't multiply by 2 again in that one, so why did you multiply by 0 a second time in the first one?
I used the identity that when multiplying anything by 0, it will equal 0. So when you multiply the fraction by 0 to cancel out the denominator, i'm saying that since you're multiplying by 0 it automatically has to equal 0, regardless of all this "cancel out the denominator" stuff you originally tried to do.
also what general skar said. lol.