Question

Draw the graphs of the pair of linear equations x - y = 1 and 2x + y = 8 and solve them.

Answer 1

x - y = 1

y = x - 1

x	0	1	2	3
y	-1	0	1	2

2x + y = 8

y = 8 - 2x

x	0	1	2	4
y	8	6	4	0

 

The two lines intersect at point (3, 2). So, the solution of the given pair of linear equations is x = 3, y = 2.