Question 743146
y= 2x+4 [1]
y=-3x-1 [2]


Subtract [1] from [2]


Left hand side of [1] - left hand side of [2] = Right hand side of [1] - right hand side of [2] 


Hence y-y = 2x - (-3x) +4 - (-1) 
Implies 0 = 5x +5
Rearranging x = 5/(-5) = -1

Substitute x=-1 in [1], gives y = 2(-1)+4 = 2
Checking, substitute x=-1 in [2], gives y = -3(-1)-1 = 2

hence x = -1, y = 2