book Maths Puzzle Numerical Ability

The winner of a recent election had 220 more votes than the loser. There werea total of 810 votes for the two canidates. How many votes did each candidate have?

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I need help with a question, Find the value of a in the equation

5
--- =
a+3

3
---
a-2

I think the answer is a= 2 3/8

Am I right, Can someone let me know? One more.
I am supposed to multiply and write as a polynomial in standard form: (2x+1)(x^3-x+2). I came up with 2x^4+1x^3-2x^2+3x+2. My question is how to put it into standard form?