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Simplifying 3.9 = 0.4x + -1.62 Reorder the terms: 3.9 = -1.62 + 0.4x Solving 3.9 = -1.62 + 0.4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4x' to each side of the equation. 3.9 + -0.4x = -1.62 + 0.4x + -0.4x Combine like terms: 0.4x + -0.4x = 0.0 3.9 + -0.4x = -1.62 + 0.0 3.9 + -0.4x = -1.62 Add '-3.9' to each side of the equation. 3.9 + -3.9 + -0.4x = -1.62 + -3.9 Combine like terms: 3.9 + -3.9 = 0.0 0.0 + -0.4x = -1.62 + -3.9 -0.4x = -1.62 + -3.9 Combine like terms: -1.62 + -3.9 = -5.52 -0.4x = -5.52 Divide each side by '-0.4'. x = 13.8 Simplifying x = 13.8
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