Write five different linear equations in two variables and find three solutions for each of them?

Form the pair of linear equations in the following problems and find their solutions (if they exist) by the elimination method: A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Saritha paid Rs. 27 for a book kept for seven days, while Susy paid Rs. 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.

Form the pair of linear equations in the following problems and find their solutions (if they exist) by the elimination method: Five years ago, Nuri was thrice as old as Sonu. Ten years later, Nuri will be twice as old as Sonu. How old are Nuri and Sonu?

Write each of the following as an equation in two variables : y = 2

Write each of the following as an equation in two variables : x = - 5

Form the pair of linear equations for the problems and find their solution by substitution method: Five years hence, the age of Jacob will be three times that of his son. Five years ago, Jacob's age was seven times that of his son. What are their present ages?