18a+57=-21

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Solution for 18a+57=-21 equation: 



18a+57=-21

We move all terms to the left:

18a+57-(-21)=0

We add all the numbers together, and all the variables

18a+78=0

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

18a=-78

a=-78/18

a=-4+1/3

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