To solve the equation \( 82.78 ( p + 11.892) = 72.8464 \) for \( p \), follow these steps:
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Distribute \( 82.78 \) on the left side of the equation:
\[ 82.78p + 82.78 \times 11.892 = 72.8464 \]
First, calculate \( 82.78 \times 11.892 \):
\[ 82.78 \times 11.892 \approx 985.479536 \]
So, the equation becomes:
\[ 82.78p + 985.479536 = 72.8464 \]
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Isolate \( 82.78p \) by subtracting \( 985.479536 \) from both sides:
\[ 82.78p = 72.8464 - 985.479536 \]
Now, calculate \( 72.8464 - 985.479536 \):
\[ 72.8464 - 985.479536 \approx -912.633136 \]
Thus, the equation now is:
\[ 82.78p = -912.633136 \]
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Solve for \( p \) by dividing both sides by \( 82.78 \):
\[ p = \frac{-912.633136}{82.78} \]
Now, calculate \( \frac{-912.633136}{82.78} \):
\[ p \approx -11.024 \]
Therefore, the solution for \( p \) is approximately:
\[ \boxed{-11.024} \]