f + t = 20 ------> f = 20 - t
5f + 10t = 165
Substitute!
5(20 - t) + 10t = 165
100 - 5t + 10t = 165
5t = 65
t = 13
f = 20 - t
f = 20 - 13
f = 7
Carla P.
asked • 09/21/18Math Worksheet
Word problem: Mr. Owens has 20 five and ten dollar bills that have a total value of $165. How many five dollar bills does he have?
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