9s+8=21

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Solution for 9s+8=21 equation: 



9s+8=21

We move all terms to the left:

9s+8-(21)=0

We add all the numbers together, and all the variables

9s-13=0

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

9s=13

s=13/9

s=1+4/9

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