Question

What is the solution of the system of y=x - 4 and
y=3x

Answer 1

Plug in 3x into the equation y = x -4, so it would be: 3x = x - 4
Then all you have to do is solve;
3x = x -4
-x -x
2x = -4
[x = -2]
Then plug the x value in the equation again...
y = 3 x
y = 3 * -2
[y = -6]
(Answers are in []s)