#[(color(red)(x),color(blue)(y),,color(brown)(c)),(color(red)(1),color(blue)(2),"|",color(brown)(4)),(color(red)(2),color(blue)(-1),"|",color(brown)(3))]#
Using Cramer's Rule
#x=(|(color(brown)(4),color(blue)(2)),(color(brown)(3),color(blue)(-1))|)
/(|(color(red)(1),color(blue)(2)),(color(red)(2),color(blue)(-1))|)=(-4-6)/(-1-4)=(-10)/(-5)=2#
#y=(|(color(red)(1),color(brown)(4)),(color(red)(2),color(brown)(3))|)
/(|(color(red)(1),color(blue)(2)),(color(red)(2),color(blue)(-1))|)=(3-8)/(-1-4)=(-5)/(-5)=1#