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Simplifying 9x + 81 = x + -7 Reorder the terms: 81 + 9x = x + -7 Reorder the terms: 81 + 9x = -7 + x Solving 81 + 9x = -7 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. 81 + 9x + -1x = -7 + x + -1x Combine like terms: 9x + -1x = 8x 81 + 8x = -7 + x + -1x Combine like terms: x + -1x = 0 81 + 8x = -7 + 0 81 + 8x = -7 Add '-81' to each side of the equation. 81 + -81 + 8x = -7 + -81 Combine like terms: 81 + -81 = 0 0 + 8x = -7 + -81 8x = -7 + -81 Combine like terms: -7 + -81 = -88 8x = -88 Divide each side by '8'. x = -11 Simplifying x = -11
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