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Simplifying 12 + -2x + -5 = 20 Reorder the terms: 12 + -5 + -2x = 20 Combine like terms: 12 + -5 = 7 7 + -2x = 20 Solving 7 + -2x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + -2x = 20 + -7 Combine like terms: 7 + -7 = 0 0 + -2x = 20 + -7 -2x = 20 + -7 Combine like terms: 20 + -7 = 13 -2x = 13 Divide each side by '-2'. x = -6.5 Simplifying x = -6.5
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