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Simplifying 81 + -1x = 91 + -2x Solving 81 + -1x = 91 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 81 + -1x + 2x = 91 + -2x + 2x Combine like terms: -1x + 2x = 1x 81 + 1x = 91 + -2x + 2x Combine like terms: -2x + 2x = 0 81 + 1x = 91 + 0 81 + 1x = 91 Add '-81' to each side of the equation. 81 + -81 + 1x = 91 + -81 Combine like terms: 81 + -81 = 0 0 + 1x = 91 + -81 1x = 91 + -81 Combine like terms: 91 + -81 = 10 1x = 10 Divide each side by '1'. x = 10 Simplifying x = 10
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