Question

Solve graphically: x+y=9;x-y=1​

Answer 1

x+y=9………….(1)

x-y=1…………..(2)

(1)+(2)

2x=10

x=5

putting x as 5 in equation (1)

5+y=9

y=9–5

y=4

x=5,y=4 ans.

Answer 2

Answer:

x=1,

x+y=9

1+y=9

y=9-1

y= 8

x=2,

x+y=9

2+y=9

y=9-2

y=7

y=1,

x-y=1

x-1=1

x=1+1

x=2

y=2,

x-y=1

x-2=1

x=1+2

x=3