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Simplifying 21s + 1 = 20s + s Reorder the terms: 1 + 21s = 20s + s Combine like terms: 20s + s = 21s 1 + 21s = 21s Add '-21s' to each side of the equation. 1 + 21s + -21s = 21s + -21s Combine like terms: 21s + -21s = 0 1 + 0 = 21s + -21s 1 = 21s + -21s Combine like terms: 21s + -21s = 0 1 = 0 Solving 1 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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