8a-1=-9

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Solution for 8a-1=-9 equation: 



8a-1=-9

We move all terms to the left:

8a-1-(-9)=0

We add all the numbers together, and all the variables

8a+8=0

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

8a=-8

a=-8/8

a=-1

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