25%of students in 9th class are girls and others are boys. Form a linear equation in 2 variables and find number of boys. if number of girls is 25
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Let the number of girls be X.
Let the total number of students in the 9th Grade be Y.
Show the number of girls = 25/100 of Y.
No. of boys = Y - X = Y - 25/100Y = 3/4Y.
Therefore, X + 3/4Y = Y.
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