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Simplifying -3[2 + x] = -42 [2 * -3 + x * -3] = -42 [-6 + -3x] = -42 Solving -6 + -3x = -42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -3x = -42 + 6 Combine like terms: -6 + 6 = 0 0 + -3x = -42 + 6 -3x = -42 + 6 Combine like terms: -42 + 6 = -36 -3x = -36 Divide each side by '-3'. x = 12 Simplifying x = 12
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