21s=11s-90

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Solution for 21s=11s-90 equation:


21s=11s-90

We simplify the equation to the form, which is simple to understand 
21s=11s-90

We move all terms containing s to the left and all other terms to the right. 
+21s-11s=-90

We simplify left and right side of the equation. 
+10s=-90

We divide both sides of the equation by 10 to get s. 
s=-9

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