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s+2.5s+20=40
We simplify the equation to the form, which is simple to understand
s+2.5s+20=40
We move all terms containing s to the left and all other terms to the right.
+1s+2.5s=+40-20
We simplify left and right side of the equation.
+3.5s=+20
We divide both sides of the equation by 3.5 to get s.
s=5.71428571429
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