21+8s=45

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Solution for 21+8s=45 equation: 



21+8s=45

We move all terms to the left:

21+8s-(45)=0

We add all the numbers together, and all the variables

8s-24=0

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

8s=24

s=24/8

s=3

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