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Simplifying -10(s + 3) = -81 Reorder the terms: -10(3 + s) = -81 (3 * -10 + s * -10) = -81 (-30 + -10s) = -81 Solving -30 + -10s = -81 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + -10s = -81 + 30 Combine like terms: -30 + 30 = 0 0 + -10s = -81 + 30 -10s = -81 + 30 Combine like terms: -81 + 30 = -51 -10s = -51 Divide each side by '-10'. s = 5.1 Simplifying s = 5.1
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