Question

y=x+6
y=2x

Answer 1

to solve the system, consider that based on the first equation 'y' is same thing as 'x+6' and based on the second equation 'y' is same thing as '2x'.

So, just as y=y, you can say x+6=2x.

Answer 2

1) Solve for x.
2) After solving for x, plug in the x-solution that you got into any of the 2 original equations to find y.

Answer 3

i dont understand @SolomonZelman