Answer:
Shyam's original investment was $4000.
Explanation:
Suppose, Shyam's original investment was
dollar.
In the first year, his stock increased 20%. So, the value of the stock will be:
dollar.
He paid his stock broker $300 and then lost $450. So now, the value of the stock will be:
dollar.
He then withdrew $500, so the value of the remaining investment
dollar and this remaining investment doubled now.
So, the value of the investment now
dollar, which is given as $7100.
Thus, the equation will be.......

So, Shyam's original investment was $4000.