I'm willing to help you with both parts
Answer:

Step-by-step explanation:
<u>Evaluating Functions</u>
Given a function y=f(x), evaluate the function for x=a means substituting the variable for the given value.
We have the function:

Find f(-1):




Answer:
x=-12
Step-by-step explanation:
8x=-104
8x÷8=-104÷8
x=-104÷8
x=-13