75=3x+9(x+7)

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Solution for 75=3x+9(x+7) equation: 



75=3x+9(x+7)

We move all terms to the left:

75-(3x+9(x+7))=0



We calculate terms in parentheses: -(3x+9(x+7)), so:

3x+9(x+7)

We multiply parentheses

3x+9x+63

We add all the numbers together, and all the variables

12x+63

Back to the equation:

-(12x+63)



We get rid of parentheses

-12x-63+75=0

We add all the numbers together, and all the variables

-12x+12=0

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

-12x=-12

x=-12/-12

x=1

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