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Simplifying -5 + 12 = 3x + -20 Combine like terms: -5 + 12 = 7 7 = 3x + -20 Reorder the terms: 7 = -20 + 3x Solving 7 = -20 + 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. 7 + -3x = -20 + 3x + -3x Combine like terms: 3x + -3x = 0 7 + -3x = -20 + 0 7 + -3x = -20 Add '-7' to each side of the equation. 7 + -7 + -3x = -20 + -7 Combine like terms: 7 + -7 = 0 0 + -3x = -20 + -7 -3x = -20 + -7 Combine like terms: -20 + -7 = -27 -3x = -27 Divide each side by '-3'. x = 9 Simplifying x = 9
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