SOLUTION: In a class 2/9 of the students are female and the remaining 21 students are male. How many students are in the class? Is there a formula to solve this?

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Question 602352: In a class 2/9 of the students are female and the remaining 21 students are male. How many students are in the class?
Is there a formula to solve this?
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
(2/9)x + 21 = x

subtracting (2/9)x ___ 21 = (7/9)x

multiplying by 9/7 ___ 27 = x