78=-3-9x

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Solution for 78=-3-9x equation: 



78=-3-9x

We move all terms to the left:

78-(-3-9x)=0

We add all the numbers together, and all the variables

-(-9x-3)+78=0

We get rid of parentheses

9x+3+78=0

We add all the numbers together, and all the variables

9x+81=0

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

9x=-81

x=-81/9

x=-9

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