Question

is the profit on selling an article for Rs425 is the sameas the loss on selking it for rs 355 then the cost price of the article is

Answer 1

let the cost price of an article=x rs.
selling price of an article=425 rs
profit=selling price-cost price
=425-x
in 2nd case 
selling price of an article=355 rs
loss=cost price- selling price
=x-355
according to the condition
profit=loss
425-x=x-355
put constant terms on one side and variables on other side
x+x=355+425
2x=780
dividing both sides by 2
2x/2=780/2
x=390 rs
cost price of an article=390 RS.