-6-9a=84

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Solution for -6-9a=84 equation: 



-6-9a=84

We move all terms to the left:

-6-9a-(84)=0

We add all the numbers together, and all the variables

-9a-90=0

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

-9a=90

a=90/-9

a=-10

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