Elimination Method of Finding Solution of a Pair of Linear Equations
In a class th...
Question
In a class there are 4 more girls than boys . When only 8 boys were absent the number of girls were twice the number of girls.what is the total number of girls and boys in the class. Please answer it with all steps.
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Solution
let a number of boys x and number of girls y there are 4 more girls than boys so, y= x+4
now When only 8 boys were absent the number of girls was twice the number of boys. 2(x-8)=y 2x -16= x+4 2x-x= 16+4 =20 x=20 number of boys = x =20 number of girls = y = x+4 = 20+4 =24