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Simplifying 3x + 4 = 129 Reorder the terms: 4 + 3x = 129 Solving 4 + 3x = 129 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 3x = 129 + -4 Combine like terms: 4 + -4 = 0 0 + 3x = 129 + -4 3x = 129 + -4 Combine like terms: 129 + -4 = 125 3x = 125 Divide each side by '3'. x = 41.66666667 Simplifying x = 41.66666667
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