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Simplifying -12 + -5X + 2x2 = 0 Solving -12 + -5X + 2x2 = 0 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '12' to each side of the equation. -12 + -5X + 12 + 2x2 = 0 + 12 Reorder the terms: -12 + 12 + -5X + 2x2 = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -5X + 2x2 = 0 + 12 -5X + 2x2 = 0 + 12 Combine like terms: 0 + 12 = 12 -5X + 2x2 = 12 Add '-2x2' to each side of the equation. -5X + 2x2 + -2x2 = 12 + -2x2 Combine like terms: 2x2 + -2x2 = 0 -5X + 0 = 12 + -2x2 -5X = 12 + -2x2 Divide each side by '-5'. X = -2.4 + 0.4x2 Simplifying X = -2.4 + 0.4x2
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