Mr Tan bought a laptop at a discount. If he sold the laptop at its usual price, he would gain a $550 profit. If he sold it at 80% of its usual price, he would lose $350 (receive $350 less than the amount he paid). How much did Mr Tan pay for the laptop?
Mr Tan bought laptop for
Let's assume , Mr Tan bought laptop for
usual price is
So, Mr Tan bought laptop for