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Simplifying 3x + -12x + -6 = 42 Reorder the terms: -6 + 3x + -12x = 42 Combine like terms: 3x + -12x = -9x -6 + -9x = 42 Solving -6 + -9x = 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 + -9x = 42 + 6 Combine like terms: -6 + 6 = 0 0 + -9x = 42 + 6 -9x = 42 + 6 Combine like terms: 42 + 6 = 48 -9x = 48 Divide each side by '-9'. x = -5.333333333 Simplifying x = -5.333333333
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