Question

two students of class 9 donated rs.300 in the relief fund. represent this in the form of linear equation in two variables.

Answer 1

x + y = 300
y = 300 - x
sub stitute y = 300 - x
300 - x = 300 - x
 -2 x = 300
 x = 300 / 2
x = 150

Answer 2

let one student amount be x and other's be y
then x+y=300