Answer:
Maria bought 70 packages
Step-by-step explanation:
Maria bought n packages of cards at $0.80 per package.
She sold n - 18 packages at $2.
She made a profit of $48.
Profit = (Amount of money made selling packages) - (Amount of money spent buying packages)
Profit = $48 = ($2)(n - 18) - ($0.80)n
2(n - 18) - 0.80n = 48
2n - 36 - 0.80n = 48
1.2n - 36 = 48
1.2n = 84
n = 70
Maria bought 70 packages
