F(a) = 1.065a
g(b) = b + 20
g(f(a)) = g(1.065a) = 1.065a + 20
a is is the cost of furniture.
b is the cost of the furniture and sales tax.
f(a) is the cost of furniture and sales tax.
g(b) is the cost of the furniture, sales tax and delivery fee.
g(f(a)) is the cost of the furniture, sales tax and delivery fee.
Subtract the 4 from both sides which makes the answer x=20
.............................................................
−6.5(n−5)=18.2
distribute
-6.5n +32.5 = 18.2
subtract 32.5 from each side
-6.5n = -13.4
divide each side by -6.5
n=2.2
Answer n=2.2
I believe the equation is 3x-50
hope this helps (: