The cost of one scale is Rs. 5 and one pen is Rs. 8. Raju paid Rs. 130 in total on purchase of both. Write a linear equation for this problem and write 3 different other possible solutions.

Cost of Mathematics textbook is Rs. 10 less than twice of cost of English textbook. Write this in linear equaton.

Nagoori and Mariam two students of class IX of a school together collected Rs.1000 for the prime minister relief fund for victims of natural calamities. Write a linear equation and draw a graph to depict the statement.

We have a linear quations 2x + 3y - 8 = 0. Write another linear equation in two variables x and y such that the geometrical representation of the pair so formed is intersecting lines. Now, write two more linear equations so that one forms a pair of parllel lines and the second forms coincident line with the given equation.

The cost of 7 oranges and 10 apples is Rs 192 whereas the cost of same kind of 5 organges and 9 apples is Rs 165. Find the cost of one orange and that of one apple.

A player tosses 3 fair coins and wins Rs. 8 if three heads occur, Rs. 3 if 2 heads occur and Rs. 1 if one head occurs. If the game as to be fair (i.e., expected value is zero) how must should he lose, if no head occur ?