How do I use the addition method to solve this?
4x - y = 3
2x + 3y = 19
By addition method, it is the same thing as elimination, which is what it is officially called.
So we can mulitply the bottom equation by 2 so that we can then cancle out the "x's" later on
Now we have the two equations
4x-y=3 , 4x+6y=38
We can then subtract these two equations to cancel out the "x"
So now we have figured out our y value is 7, and we can substitute it into our equation to get our "x" value now.
x=5/2 or 2.5