Question

X+2y=9; x-2y=-5. solve the equation by graphical method.

Answer 1

Step-by-step explanation:

x+2y=9. (1)

put in x 1

1+2y=9

1+2y=9

2y=9-1

2y=8

y=8/2

y=4

put in x 2

2+2y=9

2y=9-2

2y=7

y=7/2

y=6.5

put in x 3

3+2y=9

2y=9-3

2y=6

y=6/2

y=3

x-2y=-5. (2)

putinx 1

1-2y=-5

2y=-5-1.

2y=-6

y=-6/2

y = -3

putinx 2

2+2y=-5

2y=-5-2

2y=-7

y=-7/2

y=-6.5

putinx 3

3+2y=-5

2y=-5-3

2y=-8

y=-8/2

y=-4