7p-4p=21

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Solution for 7p-4p=21 equation:



7p-4p=21
We move all terms to the left:
7p-4p-(21)=0
We add all the numbers together, and all the variables
3p-21=0
We move all terms containing p to the left, all other terms to the right
3p=21
p=21/3
p=7

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