How many cards did Jackie sell

Question

Jackie sold cards. Jackie made a profit of 0.75 and each card was $0.35. In total she made $42 how many cards did Jackie sell?

Answer 1

the profit she made on each card is given as 3/4 $ .

let us say she sold n cards.

then the profit is 3n/4 =42 

 

solvign we get n=56