Answer:

Step-by-step explanation:
Let
x ----> amount that Jethro owes in taxes
we know that
Amount that he made last year 
His tax rate 
Applying proportion
solve for x

X^2/(x- 9 = 81/(x - 9)
This is the equation for which you want the solution.
Multiplying both sides of the equation by (x - 9) we get
x^2(x - 9)/(x - 9) = 81(x - 9)/(x - 9)
So the (x - 9) goes out from both the denominator and the numerator and then the simplified equation becomes
x^2 = 81
x ^2 = (9)^2
x = 9
So the value of the unknown variable x comes out to be 9.
Answer:
20$ each visit
Step-by-step explanation
Divide 40 by 2 for her 2 visits to the bank

<em>Final Answer: </em>
Answer:
5 x - 2x + 7 - x = 2x + 7
Step-by-step explanation:
simplify
(5x - 2x - x) = 2x
2x + 7 = 2x + 7