78=135+a

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Solution for 78=135+a equation: 



78=135+a

We move all terms to the left:

78-(135+a)=0

We add all the numbers together, and all the variables

-(a+135)+78=0

We get rid of parentheses

-a-135+78=0

We add all the numbers together, and all the variables

-1a-57=0

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

-a=57

a=57/-1

a=-57

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