Solve for P
P=28
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420-6P-4P=140
Subtract 4P from both sides.
420-10P=140
Combine -6P and -4P to get -10P.
-10P=140-420
Subtract 420 from both sides.
-10P=-280
Subtract 420 from 140 to get -280.
P=\frac{-280}{-10}
Divide both sides by -10.
P=28
Divide -280 by -10 to get 28.
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