Solve for p
p=10
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30-3p=0
Swap sides so that all variable terms are on the left hand side.
-3p=-30
Subtract 30 from both sides. Anything subtracted from zero gives its negation.
p=\frac{-30}{-3}
Divide both sides by -3.
p=10
Divide -30 by -3 to get 10.
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