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13.1+2.6s=0.3+3.43-11.72
We move all terms to the left:
13.1+2.6s-(0.3+3.43-11.72)=0
We add all the numbers together, and all the variables
2.6s+13.1-(-7.99)=0
We add all the numbers together, and all the variables
2.6s+21.09=0
We move all terms containing s to the left, all other terms to the right
2.6s=-21.09
s=-21.09/2.6
s=-8+0.29/2.6
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