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Simplifying x + 15 = 3x + -69 Reorder the terms: 15 + x = 3x + -69 Reorder the terms: 15 + x = -69 + 3x Solving 15 + x = -69 + 3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3x' to each side of the equation. 15 + x + -3x = -69 + 3x + -3x Combine like terms: x + -3x = -2x 15 + -2x = -69 + 3x + -3x Combine like terms: 3x + -3x = 0 15 + -2x = -69 + 0 15 + -2x = -69 Add '-15' to each side of the equation. 15 + -15 + -2x = -69 + -15 Combine like terms: 15 + -15 = 0 0 + -2x = -69 + -15 -2x = -69 + -15 Combine like terms: -69 + -15 = -84 -2x = -84 Divide each side by '-2'. x = 42 Simplifying x = 42
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