>>11581395His selling price is 540*1.1
If x is the price of the original cow and n is the number of cows n = 2+540*1.1/(x+6)
But he brought n cows paying 540, so n = 540/x
So 540/x = 2+540*1.1/(x+6)
Solve for x and we see at once that x=27
So he brought 540/27 = 20 cows
