17=-a

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Solution for 17=-a equation: 



17=-a

We move all terms to the left:

17-(-a)=0

We add all the numbers together, and all the variables

-(-1a)+17=0

We get rid of parentheses

1a+17=0

We add all the numbers together, and all the variables

a+17=0

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

a=-17

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