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Simplifying 0.25(20 + 4s) + -0.5(12 + 2s) = 0 (20 * 0.25 + 4s * 0.25) + -0.5(12 + 2s) = 0 (5 + 1s) + -0.5(12 + 2s) = 0 5 + 1s + (12 * -0.5 + 2s * -0.5) = 0 5 + 1s + (-6 + -1s) = 0 Reorder the terms: 5 + -6 + 1s + -1s = 0 Combine like terms: 5 + -6 = -1 -1 + 1s + -1s = 0 Combine like terms: 1s + -1s = 0 -1 + 0 = 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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