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Simplifying 81 + -5x = 31x + 21 Reorder the terms: 81 + -5x = 21 + 31x Solving 81 + -5x = 21 + 31x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-31x' to each side of the equation. 81 + -5x + -31x = 21 + 31x + -31x Combine like terms: -5x + -31x = -36x 81 + -36x = 21 + 31x + -31x Combine like terms: 31x + -31x = 0 81 + -36x = 21 + 0 81 + -36x = 21 Add '-81' to each side of the equation. 81 + -81 + -36x = 21 + -81 Combine like terms: 81 + -81 = 0 0 + -36x = 21 + -81 -36x = 21 + -81 Combine like terms: 21 + -81 = -60 -36x = -60 Divide each side by '-36'. x = 1.666666667 Simplifying x = 1.666666667
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