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Simplifying 126 + -4x = 5x + -9 Reorder the terms: 126 + -4x = -9 + 5x Solving 126 + -4x = -9 + 5x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5x' to each side of the equation. 126 + -4x + -5x = -9 + 5x + -5x Combine like terms: -4x + -5x = -9x 126 + -9x = -9 + 5x + -5x Combine like terms: 5x + -5x = 0 126 + -9x = -9 + 0 126 + -9x = -9 Add '-126' to each side of the equation. 126 + -126 + -9x = -9 + -126 Combine like terms: 126 + -126 = 0 0 + -9x = -9 + -126 -9x = -9 + -126 Combine like terms: -9 + -126 = -135 -9x = -135 Divide each side by '-9'. x = 15 Simplifying x = 15
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