Hello there!
In the equation y = 8x - 5, let's replace 'x' with -1.
The equation should now look like this:
y = 8*(-1) - 5
Let's apply PEMDAS to this equation to solve for y.
We do not have P or E, so we must multiply.
8*(-1) = -8
Our equation has taken one step. Let's take a look at it now.
y = -8 - 5
We now only have one step remaining - subtraction.
Remember when you subtract from a negative, you have the same concept as adding two positive numbers.
Subtract 5 from -8.
y = -13 is your solution for y.
I hope this helps!
