Form the pair of linear equations in the following problems and find their solution by substitution method : Anu has only 10 paise and 50 paise coins in her purse. If the total number of coinsis 17 and their total value is ? 4.50, find the number of each type of coins.

Form the pair of linear equations in the following problems and find their solution by substitution method : A horse and 2 cows together cost ? 680. If a horse costs ? 80 more than a cow, find the cost of each.

From the pair of linear equations in the following problems and find their solutions (if they exist) by elimination method : There are rs 2 and rs 5 coins in a purse. If there are 60 coins of value rs 195, find the number of coins of each kind.

form the pair of linear equations for the foIlowing problems and find their solution by substitution method: The larger of two supplementary angles exceeds the smaller by 18 degrees, Find them

Form the pair of linear equations in the following problems and find their solution by substitution method : Five years ago, I was thrice as old as my son and ten years later I shall be twice as old as my son. How old are we now ?

Form the pair of linear equations in the following problems and find their solution by substitution method : If 1 is added to each of the two numbers, their ratio becomes 1 : 2 and when 5 is subtracted from each of these, the ratio becomes 5:11. Find the numbers.

Form the pair of linear equations in the following problems and find their solution by substitution method : Find the fraction which becomes to 2/3 when the numerator is increased by 2 and equal to 4/7 when the denominator is increased by 4 .

Form the pair of linear equations in the following problems and find their solution by substitution method : The path traced by two trains are given by equations x + 2y - 4 = 0 and 2x + 4y — 12 = 0. Will the path cross ?

Form the pair of linear equations in the following problems and find their solution by substitution method : A fraction reduces to 1/4 when 2 is subtracted from the numerator and 3 is added to the denominator. But it reduces 2/3 if 6 is added to the numerator and denominator is multiplied by 3. Find the fraction.