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Simplifying -4.2x + -1 = -3.9x + 2 Reorder the terms: -1 + -4.2x = -3.9x + 2 Reorder the terms: -1 + -4.2x = 2 + -3.9x Solving -1 + -4.2x = 2 + -3.9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.9x' to each side of the equation. -1 + -4.2x + 3.9x = 2 + -3.9x + 3.9x Combine like terms: -4.2x + 3.9x = -0.3x -1 + -0.3x = 2 + -3.9x + 3.9x Combine like terms: -3.9x + 3.9x = 0.0 -1 + -0.3x = 2 + 0.0 -1 + -0.3x = 2 Add '1' to each side of the equation. -1 + 1 + -0.3x = 2 + 1 Combine like terms: -1 + 1 = 0 0 + -0.3x = 2 + 1 -0.3x = 2 + 1 Combine like terms: 2 + 1 = 3 -0.3x = 3 Divide each side by '-0.3'. x = -10 Simplifying x = -10
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