102=-3(1+7x)

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Solution for 102=-3(1+7x) equation: 



102=-3(1+7x)

We move all terms to the left:

102-(-3(1+7x))=0

We add all the numbers together, and all the variables

-(-3(7x+1))+102=0



We calculate terms in parentheses: -(-3(7x+1)), so:

-3(7x+1)

We multiply parentheses

-21x-3

Back to the equation:

-(-21x-3)



We get rid of parentheses

21x+3+102=0

We add all the numbers together, and all the variables

21x+105=0

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

21x=-105

x=-105/21

x=-5

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