Question

a store sells small notebooks for $7 and large notebooks for $14. if a student buys 6 note books for $63, how many notebooks each did she buy

Answer 1

The answer is 3 of each.  3X7=21; 14X3=42, and 42+21= 63.

Answer 2

She bought 3 large notebooks and 3 small notebooks, because 3 * 14 = 42 and   3 * 7 = 21 and 21 + 42 =63