Question

The product of 8 and quantity 9 less than c is less than 13

Answer 1

According to the given statement,
8*(9 - c) < 13

Divide each side by 8.
9 - c < 13/8
Subtract 9 from each side.
-c < 13/8 - 9
-c < -59/8
Multiply each side by -1.
c > 59/8, or c > 7.375

Answer:
c > 59/8 (or c > 7.375).