solving word problems involving quadratic equations

Question

if the price of an orange was raised by 0.5$ per orange, the number of oranges a customer can buy for 2.4$ will be less by 16. what is the present price of an orange?

Answer 1

1.    (x+0.5)*(n-16)=nx=2.4$

nx-nx -16x +0.5n-8=0

-16x=8-0.5n

x=(n/32)-0.5

2....nx=2.4$ or x=2.4/n

(2.4/n)=(n/32)-0.5

(76.8/n)  =n -16

76.8 =n^2 -16n

n^2 -16n -76.8=0

quadratik equashun giv roots

=19.8321596 or -3.8321596

neether number make NE sens..

yu oenlee spend 2.4$ for sumthun that kost bout 1 $

yu oenlee get bout 2 ...so wen pries go up yu bi -14????????