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Add `3` to both sides of the equation.
Divide both sides by `3` .
`(3S)/3 = 3/3`
(S cannot be the answer since it is the variable you are solving for.)
3S - 3 =0 add 3 to both sides
`3s=3 ` divide by 3 `(3s)/3 = 3/3` s=1
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