105=7(x+3)

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Solution for 105=7(x+3) equation: 



105=7(x+3)

We move all terms to the left:

105-(7(x+3))=0



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

7(x+3)

We multiply parentheses

7x+21

Back to the equation:

-(7x+21)



We get rid of parentheses

-7x-21+105=0

We add all the numbers together, and all the variables

-7x+84=0

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

-7x=-84

x=-84/-7

x=+12

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