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Simplifying 87 + -2x = 3x + 12 Reorder the terms: 87 + -2x = 12 + 3x Solving 87 + -2x = 12 + 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. 87 + -2x + -3x = 12 + 3x + -3x Combine like terms: -2x + -3x = -5x 87 + -5x = 12 + 3x + -3x Combine like terms: 3x + -3x = 0 87 + -5x = 12 + 0 87 + -5x = 12 Add '-87' to each side of the equation. 87 + -87 + -5x = 12 + -87 Combine like terms: 87 + -87 = 0 0 + -5x = 12 + -87 -5x = 12 + -87 Combine like terms: 12 + -87 = -75 -5x = -75 Divide each side by '-5'. x = 15 Simplifying x = 15
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