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Simplifying 2x + 9 = -81 + -1x Reorder the terms: 9 + 2x = -81 + -1x Solving 9 + 2x = -81 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. 9 + 2x + x = -81 + -1x + x Combine like terms: 2x + x = 3x 9 + 3x = -81 + -1x + x Combine like terms: -1x + x = 0 9 + 3x = -81 + 0 9 + 3x = -81 Add '-9' to each side of the equation. 9 + -9 + 3x = -81 + -9 Combine like terms: 9 + -9 = 0 0 + 3x = -81 + -9 3x = -81 + -9 Combine like terms: -81 + -9 = -90 3x = -90 Divide each side by '3'. x = -30 Simplifying x = -30
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