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





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