Question

a milkman buy's some milk .if he sells it at₹5 a litre he loses ₹200 ,but when he sells it at ₹6 alitre he gain ₹150. how much milk did he purchase

Answer 1

let he buys x ltrs of milk.
5x+200=6x-150
x=350 litrs

Answer 2

Let the no. of litres be x
then x*5 +200= x*6 -150
=5x + 200 = 6x -150
= 200+150 = x
x= 350
so he purchased 350litres of milk