78=(x-3)+x

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



78=(x-3)+x

We move all terms to the left:

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



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

(x-3)+x

We add all the numbers together, and all the variables

x+(x-3)

We get rid of parentheses

x+x-3

We add all the numbers together, and all the variables

2x-3

Back to the equation:

-(2x-3)



We get rid of parentheses

-2x+3+78=0

We add all the numbers together, and all the variables

-2x+81=0

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

-2x=-81

x=-81/-2

x=40+1/2

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