Here is number 4 for rn
4) y=-2 4x-3y=18 sub -2 in for y 4x-3(-2)=18 4x-6=18 add 6 to both sides 18+6=24 4x=24 divide 4 from both sides 24/4=6 x=6
4x-3y=18 sub 6 in for x 4(6)-3y=18 24-3y=18 subtract 24 from both sides 18-24=-6 -3y=-6 divide -3 from both sides -6/-3=2 y=2
X=6, y=2 (6,2)