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There Are Boys And Girls In A Class. If The Number Of Girls Is Multiplied By Two And Added To The Number Of Boys In The Class, The Sum Is 30. If The Number Of Girls Is Multiplied By Two And The Number Of Boys In The Class Is Subtracted From It, The R?

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xiao guguai Profile
xiao guguai answered
The boys are 30-(30+R)/2, the girls are (30+R)/4.

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