Meera has some chocolates.She gave some chocolates to her brother and still she has 7 chocolates with her.If the number of chocolates she gave away is x how many chocolates did she have?

Mother has made laddus.She gives some laddus to guests and family members, still 5 laddus remain .If the number of laddus mother gave away is l, how many laddus did she make?

Champa went to a ‘Sale' to purchase some pants and skirts, When her friends asked her how many of each she had bought, she answered. "The number of skirts is two less than twice the number of pants purchased. Also, the number of skirts is four less than four times the number of pants purchased". Help her friends to find how many pants and skirts Champa bought.

A packet of plain biscuits costs Rs 6 and that of chocolate bisuits costs Rs 9. A house-wife has Rs 72 and wants to buy at least three packets of plain biscuits and at least four of chocolate biscuits. How many of each type should she buy so that she can have maximum number of packets? Make it as a LPP and solve it graphically.

A shopkeeper earns a profit of Rs.1 by selling one pen and incurs a loss of 40 pasie per pencil while selling pencils of her old stock. In the next month she earns neither profit nor loss. If she sold 70 pens, how many pencils did she sell?