78=6x+3(-3+15)

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Solution for 78=6x+3(-3+15) equation: 



78=6x+3(-3+15)

We move all terms to the left:

78-(6x+3(-3+15))=0

We add all the numbers together, and all the variables

-(6x+312)+78=0

We get rid of parentheses

-6x-312+78=0

We add all the numbers together, and all the variables

-6x-234=0

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

-6x=234

x=234/-6

x=-39

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