What is the increase of the expression \(7a - 8b + 4c\) compared to \(-3a - 5c + b\)?
\[
\begin{aligned}
&\text{Increase} = (7a - 8b + 4c) - (-3a - 5c + b) \\
&= 7a - 8b + 4c + 3a + 5c - b \\
&= (7a + 3a) + (-8b - b) + (4c + 5c) \\
&= 10a - 9b + 9c
\end{aligned}
\]
MR/Nasef.N
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