First, I would factor f(x) and g(x).
f(x)=2x(2x+3)
g(x)=(2x+3)(x+5)
Then divide.
(f/g)(x)=

Cancel out (2x+3)
you are left with 2x/(x+5)
T = 0
isolate the variable
J = 9 because 2007 / 223 = 9, and when you multiply 223 x 9, you get 2007
Answer: The sales tax rate is 3%.
Step-by-step explanation: $12.90 is 3% of $430.