-a-2a-17a=20

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Solution for -a-2a-17a=20 equation: 



-a-2a-17a=20

We move all terms to the left:

-a-2a-17a-(20)=0

We add all the numbers together, and all the variables

-20a-20=0

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

-20a=20

a=20/-20

a=-1

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