Rearranging and grouping, we obtain $(19x - 4x) + (1 - 81) = \boxed{15x - 80}$.
Question:
Simplify the following expression in $x$: $$19x + 1 - 4x - 81.$$
Answer:
Let's think step by step.

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15x - 80
Simplify the following expression in $x$: $$19x + 1 - 4x - 81.$$
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