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Simplifying 4x + -81 = 7x Reorder the terms: -81 + 4x = 7x Solving -81 + 4x = 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 + 4x + -7x = 7x + -7x Combine like terms: 4x + -7x = -3x -81 + -3x = 7x + -7x Combine like terms: 7x + -7x = 0 -81 + -3x = 0 Add '81' to each side of the equation. -81 + 81 + -3x = 0 + 81 Combine like terms: -81 + 81 = 0 0 + -3x = 0 + 81 -3x = 0 + 81 Combine like terms: 0 + 81 = 81 -3x = 81 Divide each side by '-3'. x = -27 Simplifying x = -27
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