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Simplifying D = (-8.4) + -1(-10.2) D = -8.4 + -1(-10.2) Multiply -1 * -10.2 D = -8.4 + 10.2 Combine like terms: -8.4 + 10.2 = 1.8 D = 1.8 Solving D = 1.8 Solving for variable 'D'. Move all terms containing D to the left, all other terms to the right. Simplifying D = 1.8
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