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Simplifying -2X + 3(2x + 7) = 9 Reorder the terms: -2X + 3(7 + 2x) = 9 -2X + (7 * 3 + 2x * 3) = 9 -2X + (21 + 6x) = 9 Reorder the terms: 21 + -2X + 6x = 9 Solving 21 + -2X + 6x = 9 Solving for variable 'X'. Move all terms containing X to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -2X + -21 + 6x = 9 + -21 Reorder the terms: 21 + -21 + -2X + 6x = 9 + -21 Combine like terms: 21 + -21 = 0 0 + -2X + 6x = 9 + -21 -2X + 6x = 9 + -21 Combine like terms: 9 + -21 = -12 -2X + 6x = -12 Add '-6x' to each side of the equation. -2X + 6x + -6x = -12 + -6x Combine like terms: 6x + -6x = 0 -2X + 0 = -12 + -6x -2X = -12 + -6x Divide each side by '-2'. X = 6 + 3x Simplifying X = 6 + 3x
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