Question

8. Solve graphically and find the coordinates of the points where the lines meet y axis
X+2y-7= 0, 2x - y-4=0.​

Answer 1

Explanation:

2x-y-4=0...........(2)

multiple equation (2) by 2 ,we get

4x-2y-8=0

now, add equation (1) and (2)

x+2y-7=0

+ 2x-2y-8=0

__________

3x-15=0

3x=15

x=15/3

x=5

put x=5 in equation (1)

x+2y-7=0

(5)+2y-7=0

2y=7-5

y=2/2

y=1

(5,1) is the solution of given equation