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Simplifying X + 20 + 2X = -7 + -2X + -13 Reorder the terms: 20 + X + 2X = -7 + -2X + -13 Combine like terms: X + 2X = 3X 20 + 3X = -7 + -2X + -13 Reorder the terms: 20 + 3X = -7 + -13 + -2X Combine like terms: -7 + -13 = -20 20 + 3X = -20 + -2X Solving 20 + 3X = -20 + -2X Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '2X' to each side of the equation. 20 + 3X + 2X = -20 + -2X + 2X Combine like terms: 3X + 2X = 5X 20 + 5X = -20 + -2X + 2X Combine like terms: -2X + 2X = 0 20 + 5X = -20 + 0 20 + 5X = -20 Add '-20' to each side of the equation. 20 + -20 + 5X = -20 + -20 Combine like terms: 20 + -20 = 0 0 + 5X = -20 + -20 5X = -20 + -20 Combine like terms: -20 + -20 = -40 5X = -40 Divide each side by '5'. X = -8 Simplifying X = -8
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