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-1.7S=4.5
We move all terms to the left:
-1.7S-(4.5)=0
We add all the numbers together, and all the variables
-1.7S-4.5=0
We move all terms containing S to the left, all other terms to the right
-1.7S=4.5
S=4.5/-1.7
S=-2+1/1.5454545454545
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