10p-78=2*(p+21)

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Solution for 10p-78=2*(p+21) equation: 



10p-78=2(p+21)

We move all terms to the left:

10p-78-(2(p+21))=0



We calculate terms in parentheses: -(2(p+21)), so:

2(p+21)

We multiply parentheses

2p+42

Back to the equation:

-(2p+42)



We get rid of parentheses

10p-2p-42-78=0

We add all the numbers together, and all the variables

8p-120=0

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

8p=120

p=120/8

p=15

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