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Simplifying (X + 3) + -3(x + -3) = x Reorder the terms: (3 + X) + -3(x + -3) = x Remove parenthesis around (3 + X) 3 + X + -3(x + -3) = x Reorder the terms: 3 + X + -3(-3 + x) = x 3 + X + (-3 * -3 + x * -3) = x 3 + X + (9 + -3x) = x Reorder the terms: 3 + 9 + X + -3x = x Combine like terms: 3 + 9 = 12 12 + X + -3x = x Solving 12 + X + -3x = x 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 + X + -12 + -3x = -12 + x Reorder the terms: 12 + -12 + X + -3x = -12 + x Combine like terms: 12 + -12 = 0 0 + X + -3x = -12 + x X + -3x = -12 + x Add '3x' to each side of the equation. X + -3x + 3x = -12 + x + 3x Combine like terms: -3x + 3x = 0 X + 0 = -12 + x + 3x X = -12 + x + 3x Combine like terms: x + 3x = 4x X = -12 + 4x Simplifying X = -12 + 4x
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