i have 4 problems that my dad sent me. /=fraction ^=exponent

1. 2y/y-3=-1/y

so far i got

2y^2=-y+3

2. x/2=3x+8/x

i got

x^2=6x+16

then i dont know what to do next?

3. x-2/x+6= x/2

so far

2x-4=x^2+6

4. y+2/-y=2/y+3

I DONT KNOW WHAT TO DO FOR THIS ONE?!

My questions on proportions.

1. is it possible for a portion to have two different answers for the same variable?

2. Is it true you cant add percents unless same?

Someone help