Solve the simultaneous equations by using Graphical method. x + 3y = 7; 2x + y + 1 = 0.

Solution: x + 3y = 7

x 7 4 1 y 0 1 2 (x,y) (7, 0) (4 , 1) (1, 2)

Put y = 0, we get x = 7

Put y = 1, we get x = 4

Put y = 2, we get x = 1

For second equation, 2x +y + 1 = 0

x 0 1 2 y - 1 -3 -5 (x,y) (0, -1) (1, -3) (2, -5)

Put x = 0 ,we get y = -1

Put x = 1, we get y = - 3

Put x = 2, we get y = - 5