Q 3: Find the solution set of natural numbers such that x+y = 10. {(1,9),(3,7),(4,6),(5,5),(6,4),(7,2),(8,2),(9,1)} {(2,8),(3,7),(4,6),(5,5),(6,4),(7,3),(8,1),(9,1)} {(1,9),(2,8),(3,7),(4,6),(5,5),(6,4),(7,3),(8,2),(9,1)} {(1,9),(2,8),(3,7),(4,6),(5,6),(6,4),(7,3),(8,2)}

Q 4: Solve 3x  y = 5 and 3x + 3y = 21. x = 4 and y = 3 x = 3 and y = 4 x = 2 and y = 4 x = 4 and y = 2
