posted by Mark .
Brett made muffins for his grandmother, but he gave his friend Steve 1/8 of the muffins. Then Brett saw Dori and gave her 1/3 of what he had left. Then he saw Shiela and gave her 1/7 of what he had left. By the time he arrived at his grandmothers house there were only 12 muffins.
a. How many muffins did Brett make?
b. How many muffins did he give to each person?
X - 1/8X - (1/3 * 7/8)X - (1/3 * 7/8 * 1/7)X = 12
Solve for X to get total. Multiply by the indicated fractions to get the muffins given to each person.
I hope this helps. Thanks for asking.