First input 6x for y in the top equation
[tex]4x-18x=14[/tex]
simplify
[tex]-14x=14[/tex]
divide both sides by -14
[tex]\frac{-14x}{-14}=\frac{14}{-14}[/tex]
simplify
[tex]x=-1[/tex]
[tex]y=6*-1[/tex]
simplify
[tex]y=-6[/tex]
check
[tex]-4--18=14[/tex]
simplify
[tex]-4+18=14[/tex]
x=-1 y=-6
(-1, -6)