78=3x+3(3x-14)

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Solution for 78=3x+3(3x-14) equation: 



78=3x+3(3x-14)

We move all terms to the left:

78-(3x+3(3x-14))=0



We calculate terms in parentheses: -(3x+3(3x-14)), so:

3x+3(3x-14)

We multiply parentheses

3x+9x-42

We add all the numbers together, and all the variables

12x-42

Back to the equation:

-(12x-42)



We get rid of parentheses

-12x+42+78=0

We add all the numbers together, and all the variables

-12x+120=0

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

-12x=-120

x=-120/-12

x=+10

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