Algebra
posted by Ella on .
Krystal grilled 21 burgers at a block party. She grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 pounds and each hamburger weighed 1/3 pound. How many of each did Krystal grill?
~Please help me and provide an explanation for your answer.
Please and thank you!

number of hamburgers  x
number of turkeyburgs  21x
weight of hamburgers = (1/3)x
weight of turkeyburgs = (1/4)(21x
so (1/3)x = (1/4)(21x)
times 12 , the LCD
4x = 3(21x)
4x = 633x
7x = 63
x = 9
so 9 hamburgers and 12 turkeyb's