Ajay and Vijay have some marbles. If Ajay gives 5 marbles to Vijay, he would have twice the number of marbles Vijay would have. If Vijay Gives 15 marbles to Ajay, Ajay would have 8 times the number of marbles Vijay would have. Find the number of marbles with Vijay.
A person mixes three varieties of wheat costing rs 20/kg, rs 24/kg, rs 30/kg in the ratio of 1:5:2 and sells the mixture at a profit of 20%. Find the selling price of the mixture when it is sold at 33% profit.
There is something I don't understand about algebra: It has been around for thousands of years, yet no one has ever found out what the value of "x" or "y" really is.