20s-11s=-18

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Solution for 20s-11s=-18 equation: 



20s-11s=-18

We move all terms to the left:

20s-11s-(-18)=0

We add all the numbers together, and all the variables

9s+18=0

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

9s=-18

s=-18/9

s=-2

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