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Simplifying 9X + 3 = -12X + -42 Reorder the terms: 3 + 9X = -12X + -42 Reorder the terms: 3 + 9X = -42 + -12X Solving 3 + 9X = -42 + -12X Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '12X' to each side of the equation. 3 + 9X + 12X = -42 + -12X + 12X Combine like terms: 9X + 12X = 21X 3 + 21X = -42 + -12X + 12X Combine like terms: -12X + 12X = 0 3 + 21X = -42 + 0 3 + 21X = -42 Add '-3' to each side of the equation. 3 + -3 + 21X = -42 + -3 Combine like terms: 3 + -3 = 0 0 + 21X = -42 + -3 21X = -42 + -3 Combine like terms: -42 + -3 = -45 21X = -45 Divide each side by '21'. X = -2.142857143 Simplifying X = -2.142857143
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