Let x = new apple price
Let y = $0.75 additional price
Let z = original price
3 pounds = apple Sam bought
$5.88 = total amount of apples Sam bought
1st, let us divide 3 pounds from $5.88
5.88 ÷ 3 = 1.96 this is the new apple price per pound.
X = $1.96
2nd, if you want to find the original price of the apples per pound before the increase, we just need to subtract the X to Y.
$1.96 –$ 0.75 = $1.21 is the original price of apple before the increase.
I am assuming that it only 3 pounds of apples, since it will be a negative / void if it will be 333 pounds, or even 33 pounds.