7=2p-1

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Solution for 7=2p-1 equation: 



7=2p-1

We move all terms to the left:

7-(2p-1)=0

We get rid of parentheses

-2p+1+7=0

We add all the numbers together, and all the variables

-2p+8=0

We move all terms containing p to the left, all other terms to the right

-2p=-8

p=-8/-2

p=+4

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