I need help simplifying these expressions.

1/3 + 2/x= 3/x

2/5 - 3/x=1/5x

3/x+1 - 1/x=1/2

4/x+1=3/x+2

x/x+3= x-2/x

2x^2-4x/x-2

5x/2 times 1/x

12x/5 divided by 6x/7

<<1/3 + 2/x = 3/x >>

I'll do this one. Show us what you can do with the others.

1/3 = (1/x)(3 - 2) = 1/x
x = 3