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Simplifying 1.42 = -6.8 + 4.2D Solving 1.42 = -6.8 + 4.2D Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Add '-4.2D' to each side of the equation. 1.42 + -4.2D = -6.8 + 4.2D + -4.2D Combine like terms: 4.2D + -4.2D = 0.0 1.42 + -4.2D = -6.8 + 0.0 1.42 + -4.2D = -6.8 Add '-1.42' to each side of the equation. 1.42 + -1.42 + -4.2D = -6.8 + -1.42 Combine like terms: 1.42 + -1.42 = 0.00 0.00 + -4.2D = -6.8 + -1.42 -4.2D = -6.8 + -1.42 Combine like terms: -6.8 + -1.42 = -8.22 -4.2D = -8.22 Divide each side by '-4.2'. D = 1.957142857 Simplifying D = 1.957142857
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