Example:
PROBLEM:
Five notebooks cost $80.How many notebooks can buy with $112?
SOLVE:
notebooks=notebooks
money money
5 = n
80=112
Solution:
80n=112 × 5 Find the productof the means and the extremes.
80n=560
80 80 Divide both sides of the equation by 80
n=7 ANSWER: 7 notebooks can buy with $112
