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7(30s)=210.7(5s)=35.210+35=246
We move all terms to the left:
7(30s)-(210.7(5s))=0
We add all the numbers together, and all the variables
730s-(+210.75s)=0
We get rid of parentheses
730s-210.75s=0
We add all the numbers together, and all the variables
519.25s=0
s=0/519.25
s=0
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