3s+31=100

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Solution for 3s+31=100 equation: 



3s+31=100

We move all terms to the left:

3s+31-(100)=0

We add all the numbers together, and all the variables

3s-69=0

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

3s=69

s=69/3

s=23

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