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8p-5p-15=21p-3
We simplify the equation to the form, which is simple to understand
8p-5p-15=21p-3
We move all terms containing p to the left and all other terms to the right.
+8p-5p-21p=-3+15
We simplify left and right side of the equation.
-18p=+12
We divide both sides of the equation by -18 to get p.
p=-0.666666666667
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