-78=142-a

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Solution for -78=142-a equation: 



-78=142-a

We move all terms to the left:

-78-(142-a)=0

We add all the numbers together, and all the variables

-(-1a+142)-78=0

We get rid of parentheses

1a-142-78=0

We add all the numbers together, and all the variables

a-220=0

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

a=220

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