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Simplifying -7x + -9 = x + -81 Reorder the terms: -9 + -7x = x + -81 Reorder the terms: -9 + -7x = -81 + x Solving -9 + -7x = -81 + 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. -9 + -7x + -1x = -81 + x + -1x Combine like terms: -7x + -1x = -8x -9 + -8x = -81 + x + -1x Combine like terms: x + -1x = 0 -9 + -8x = -81 + 0 -9 + -8x = -81 Add '9' to each side of the equation. -9 + 9 + -8x = -81 + 9 Combine like terms: -9 + 9 = 0 0 + -8x = -81 + 9 -8x = -81 + 9 Combine like terms: -81 + 9 = -72 -8x = -72 Divide each side by '-8'. x = 9 Simplifying x = 9
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