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12s+7s+1=0
We simplify the equation to the form, which is simple to understand
12s+7s+1=0
We move all terms containing s to the left and all other terms to the right.
+12s+7s=0-1
We simplify left and right side of the equation.
+19s=-1
We divide both sides of the equation by 19 to get s.
s=-0.0526315789474
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