SOLUTION: The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students?

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Question 970486: The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students?
Answer by lwsshak3(11628) About Me  (Show Source):
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The ratio of girls to boys in Liza’s classroom is 5 to 4. How many girls are in her classroom if there is a total of 27 students?
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let x=number of girls in Lisa's classroom
27-x=number of boys in Lisa's classroom
..
x%2F%2827-x%29=5%2F4
5(27-x)=4x
135-5x=4x
9x=135
x=15
number of girls in Lisa's classroom=15