Step One: Plug in (x-1) for y in 2x-y = 0
![2x-(x-1)=0](https://tex.z-dn.net/?f=2x-%28x-1%29%3D0)
Step Two: Distribute the negative
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![2x -x -(-1)=0 \\ 2x-x+1=0](https://tex.z-dn.net/?f=2x%20-x%20-%28-1%29%3D0%20%5C%5C%202x-x%2B1%3D0)
Step Three: Add like terms on one side of the equation
![x + 1=0](https://tex.z-dn.net/?f=x%20%2B%201%3D0)
Step Four: Subtract 1 from both sides
![x+1-1=0-1 \\ x = -1](https://tex.z-dn.net/?f=x%2B1-1%3D0-1%20%5C%5C%20x%20%3D%20-1)
Step Five: Plug x into one original equation (I chose y=x-1 but you can do either one)
![y=x-1 \\ y=-1-1 \\ y=-2](https://tex.z-dn.net/?f=y%3Dx-1%20%5C%5C%20y%3D-1-1%20%5C%5C%20y%3D-2)
That's the answer to the problem, x = -1, y = -2 (-1,-2)!
Hope this helps!
Step-by-step explanation:
15X - 4Y when X=7 Y=8
=15*(7) - 4*(8)
= 105 - 32
=73
Answer:
d. 1/16
why does the answer neeeds to be 20 characters long?!
Answer:
It should be D.
Step-by-step explanation: