Verified answer

well, put the value of y (the first equation) in the second one o.o

if y=2x+6

x^2+3=2x+6

o.o now you pass all of it to the left side hell yeah

x^2+3-2x-6=0

x^2-2x-3=0

(x-3 )(x+1)=0

x=3

x=-1

y=2(3)+6

y=12

y=2(-1)+6

y=4

If you didn't understand my lame explanation then I have failed. :D

LOL dafuq did I just write ;-;

make the 2 problems equal to each other because y is = to both answers. Solve for x.