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4.99+2.8s=19.9s+15.9s-8.21
We move all terms to the left:
4.99+2.8s-(19.9s+15.9s-8.21)=0
We add all the numbers together, and all the variables
2.8s-(35.8s-8.21)+4.99=0
We get rid of parentheses
2.8s-35.8s+8.21+4.99=0
We add all the numbers together, and all the variables
-33s+13.2=0
We move all terms containing s to the left, all other terms to the right
-33s=-13.2
s=-13.2/-33
s=11/27.5
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