-2p+4+5p-7=-21

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Solution for -2p+4+5p-7=-21 equation: 



-2p+4+5p-7=-21

We move all terms to the left:

-2p+4+5p-7-(-21)=0

We add all the numbers together, and all the variables

3p+18=0

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

3p=-18

p=-18/3

p=-6

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