78=a+9

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Solution for 78=a+9 equation: 



78=a+9

We move all terms to the left:

78-(a+9)=0

We get rid of parentheses

-a-9+78=0

We add all the numbers together, and all the variables

-1a+69=0

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

-a=-69

a=-69/-1

a=+69

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