4p-21=7

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Solution for 4p-21=7 equation:



4p-21=7
We move all terms to the left:
4p-21-(7)=0
We add all the numbers together, and all the variables
4p-28=0
We move all terms containing p to the left, all other terms to the right
4p=28
p=28/4
p=7

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