12s=4s-21

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Solution for 1\2s=4s-21 equation:


1\2s=4s-21

We simplify the equation to the form, which is simple to understand 
1\2s=4s-21

We move all terms containing s to the left and all other terms to the right. 
+1s-4s=-21

We simplify left and right side of the equation. 
-3s=-21

We divide both sides of the equation by -3 to get s. 
s=7

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