Question

Y = 2x – 7
y = x – 7

Answer 1

`x=0`

`y=-7`

Explanation:

Let's use elimination.

We can multiply the second equation by -2 so that we can eliminate one variable from the system of equations.

`-2(y=x-7)`

`-2y=-2x+14`

Now we can use elimination and subtract.

`y=2x-7`

`-2y=-2x+14`

`-y=7`

`y=-7`

Now we can plug in the value of y into the first equation.

`-7=2x-7`

`2x=0`

`x=0`

We can plug these values to check.

`-7=0-7`

`-7=0-7`