Question

1. Solve the linear pair of equations graphically and find the co-ordinates of that points w
represent them, cut at y-axis 3x +2y = 12; 5x – 2y = 4.
(iii)​

Answer 1

For equation (i),

When y = 0, we have x =3

When x= 0, we have y =3

Thus we have the following table giving points on the line x + y = 3

x

0

3

y

3

0

For equation (ii),

We solve for y:

⇒ y = (12 – 2x)/5

So, when x = 1

y = (12 – 2(1))/5 = 2

And, when x = 6

⇒ y = (12 – 2(6))/5 = 0

Thus we have the following table giving points on the line 2x + 5y = 12

x

1

6

y

2

0