21-3p=3(-4p-8)

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Solution for 21-3p=3(-4p-8) equation:



21-3p=3(-4p-8)
We move all terms to the left:
21-3p-(3(-4p-8))=0
We calculate terms in parentheses: -(3(-4p-8)), so:
3(-4p-8)
We multiply parentheses
-12p-24
Back to the equation:
-(-12p-24)
We get rid of parentheses
-3p+12p+24+21=0
We add all the numbers together, and all the variables
9p+45=0
We move all terms containing p to the left, all other terms to the right
9p=-45
p=-45/9
p=-5

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