Question

Solve the following simultaneous equations using graphical method
x+y=6
x−y=4

Answer 1

Answer:

x+y=6  

∴y=6−x

x 1 2 3

y 5 4 3

(x,y)  

(1,5)  

(2,4)  

(3,3)

x−y=4

∴y=x−4

x 1 2 3

y −3 −2 −1

(x,y)  

(1,−3)  

(2,−2)  

(3,−1)

Answer 2

Answer:

2x=10

x=5

5+y=6

y=1

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