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