Answer
The system income will $\$1177$ billion in 14 years after 2004 or 2018.
Work Step by Step
Let $x$ be a year in which the system income will be $\$1177$ billion.
So,
$43x+575=1177$ ,
Then solve for x,
$\begin{align}
& 43x=1177-575 \\
& 43x=602 \\
& x=\frac{602}{43} \\
& =14
\end{align}$
Hence, the system income will be $\$1177$ billion in 14 years after 2004 or 2018.
