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Simplifying 81 + -5x = 21x + -10 Reorder the terms: 81 + -5x = -10 + 21x Solving 81 + -5x = -10 + 21x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21x' to each side of the equation. 81 + -5x + -21x = -10 + 21x + -21x Combine like terms: -5x + -21x = -26x 81 + -26x = -10 + 21x + -21x Combine like terms: 21x + -21x = 0 81 + -26x = -10 + 0 81 + -26x = -10 Add '-81' to each side of the equation. 81 + -81 + -26x = -10 + -81 Combine like terms: 81 + -81 = 0 0 + -26x = -10 + -81 -26x = -10 + -81 Combine like terms: -10 + -81 = -91 -26x = -91 Divide each side by '-26'. x = 3.5 Simplifying x = 3.5
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