Solve for p
p=8000
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640\times 25=2p
Multiply both sides by 25.
16000=2p
Multiply 640 and 25 to get 16000.
2p=16000
Swap sides so that all variable terms are on the left hand side.
p=\frac{16000}{2}
Divide both sides by 2.
p=8000
Divide 16000 by 2 to get 8000.
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