-4a-3-8=21

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Solution for -4a-3-8=21 equation: 



-4a-3-8=21

We move all terms to the left:

-4a-3-8-(21)=0

We add all the numbers together, and all the variables

-4a-32=0

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

-4a=32

a=32/-4

a=-8

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