Question

Solve the problem, If f(x)= x-3A/3x+5 and f(3)=6. what is the value of A?

Answer 1

@jim_thompson5910

Answer 2

this is f(x), right?

\[\Large f(x) = \frac{x-3A}{3x+5}\]

Answer 3

Correct

Answer 4

\[\Large f(x) = \frac{x-3A}{3x+5}\]
\[\Large f(3) = \frac{3-3A}{3(3)+5}\]
\[\Large 6 = \frac{3-3A}{3(3)+5}\]
\[\Large 6 = \frac{3-3A}{14}\]
\[\Large 14*6 = 14*\frac{3-3A}{14}\]
\[\Large 84 = 3-3A\]
\[\Large A = ??\]

Answer 5

In step 2, I replaced every x with 3
In step 3, I replaced f(3) with 6 (since f(3) = 6)

Answer 6

Okay so I got A= -27