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Simplifying -3x + 9 = x Reorder the terms: 9 + -3x = x Solving 9 + -3x = 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 + -3x + -1x = x + -1x Combine like terms: -3x + -1x = -4x 9 + -4x = x + -1x Combine like terms: x + -1x = 0 9 + -4x = 0 Add '-9' to each side of the equation. 9 + -9 + -4x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -4x = 0 + -9 -4x = 0 + -9 Combine like terms: 0 + -9 = -9 -4x = -9 Divide each side by '-4'. x = 2.25 Simplifying x = 2.25
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