-8a+11=-21

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Solution for -8a+11=-21 equation: 



-8a+11=-21

We move all terms to the left:

-8a+11-(-21)=0

We add all the numbers together, and all the variables

-8a+32=0

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

-8a=-32

a=-32/-8

a=+4

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