129=7x+3(2x+17)

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Solution for 129=7x+3(2x+17) equation: 



129=7x+3(2x+17)

We move all terms to the left:

129-(7x+3(2x+17))=0



We calculate terms in parentheses: -(7x+3(2x+17)), so:

7x+3(2x+17)

We multiply parentheses

7x+6x+51

We add all the numbers together, and all the variables

13x+51

Back to the equation:

-(13x+51)



We get rid of parentheses

-13x-51+129=0

We add all the numbers together, and all the variables

-13x+78=0

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

-13x=-78

x=-78/-13

x=+6

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