9a+1-7a-5=-20

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Solution for 9a+1-7a-5=-20 equation: 



9a+1-7a-5=-20

We move all terms to the left:

9a+1-7a-5-(-20)=0

We add all the numbers together, and all the variables

2a+16=0

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

2a=-16

a=-16/2

a=-8

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