$$-7p^2+14000p = 7000000$$
Answer
$$ p = 1000 $$
Explanation
$$ \begin{aligned} -7p^2+14000p &= 7000000&& \text{move all terms to the left hand side } \\[1 em]-7p^2+14000p-7000000 &= 0&& \\[1 em] \end{aligned} $$
$ -7x^{2}+14000x-7000000 = 0 $ is a quadratic equation.
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