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Simplifying -81 + -2x = 81 + 7x Solving -81 + -2x = 81 + 7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7x' to each side of the equation. -81 + -2x + -7x = 81 + 7x + -7x Combine like terms: -2x + -7x = -9x -81 + -9x = 81 + 7x + -7x Combine like terms: 7x + -7x = 0 -81 + -9x = 81 + 0 -81 + -9x = 81 Add '81' to each side of the equation. -81 + 81 + -9x = 81 + 81 Combine like terms: -81 + 81 = 0 0 + -9x = 81 + 81 -9x = 81 + 81 Combine like terms: 81 + 81 = 162 -9x = 162 Divide each side by '-9'. x = -18 Simplifying x = -18
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