Answer: 
Step-by-step explanation:
Given :

add 2 to both sides

Therefore :


Answer:
4. x= 26 5. 7.333333 6. 16.4
Step-by-step explanation:
I believe it is negative 2/2, hope this helps you out.
Answer:$36
Step-by-step explanation:
He has sold 6 and made $18 6x2=12 2x18=36
We have x = 4 repeating itself
If we graph the two points (4,1) and (4,20), then we see the relation fails the vertical line test.
The input x = 4 leads to more than one output y = 1 and y = 20 simultaneously.
This is why we don't have a function.