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Simplifying 2x + 6x + -81 = 63 Reorder the terms: -81 + 2x + 6x = 63 Combine like terms: 2x + 6x = 8x -81 + 8x = 63 Solving -81 + 8x = 63 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '81' to each side of the equation. -81 + 81 + 8x = 63 + 81 Combine like terms: -81 + 81 = 0 0 + 8x = 63 + 81 8x = 63 + 81 Combine like terms: 63 + 81 = 144 8x = 144 Divide each side by '8'. x = 18 Simplifying x = 18
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