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Simplifying 0.3x + -4.2 = 0.9x Reorder the terms: -4.2 + 0.3x = 0.9x Solving -4.2 + 0.3x = 0.9x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.9x' to each side of the equation. -4.2 + 0.3x + -0.9x = 0.9x + -0.9x Combine like terms: 0.3x + -0.9x = -0.6x -4.2 + -0.6x = 0.9x + -0.9x Combine like terms: 0.9x + -0.9x = 0.0 -4.2 + -0.6x = 0.0 Add '4.2' to each side of the equation. -4.2 + 4.2 + -0.6x = 0.0 + 4.2 Combine like terms: -4.2 + 4.2 = 0.0 0.0 + -0.6x = 0.0 + 4.2 -0.6x = 0.0 + 4.2 Combine like terms: 0.0 + 4.2 = 4.2 -0.6x = 4.2 Divide each side by '-0.6'. x = -7 Simplifying x = -7
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