21x+8=-1

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Solution for 21x+8=-1 equation: 



21x+8=-1

We move all terms to the left:

21x+8-(-1)=0

We add all the numbers together, and all the variables

21x+9=0

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

21x=-9

x=-9/21

x=-3/7

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