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Simplifying 72x + 129 = 63x + 45 Reorder the terms: 129 + 72x = 63x + 45 Reorder the terms: 129 + 72x = 45 + 63x Solving 129 + 72x = 45 + 63x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-63x' to each side of the equation. 129 + 72x + -63x = 45 + 63x + -63x Combine like terms: 72x + -63x = 9x 129 + 9x = 45 + 63x + -63x Combine like terms: 63x + -63x = 0 129 + 9x = 45 + 0 129 + 9x = 45 Add '-129' to each side of the equation. 129 + -129 + 9x = 45 + -129 Combine like terms: 129 + -129 = 0 0 + 9x = 45 + -129 9x = 45 + -129 Combine like terms: 45 + -129 = -84 9x = -84 Divide each side by '9'. x = -9.333333333 Simplifying x = -9.333333333
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