Question

solve the pair of linear eq grapically 2x + y + 6 = 0 , 4x - 2y - 4 = 0

Answer 1

2x + y + 6 = 0      eq 1

4x - 2y - 4 = 0         eq 2

from eq 1

⇒y= -6-2x

by putting the value of y in eq 2, we get

⇒4x- 2( -6-2x) - 4 = 0

⇒4x + 12 +4x -4 = 0

⇒8x + 8= 0

⇒x = -1

from eq 1

⇒2(-1) + y = -6

⇒y= -4