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Simplifying D(x) = 800 + -1x Multiply D * x xD = 800 + -1x Solving xD = 800 + -1x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'x' to each side of the equation. x + xD = 800 + -1x + x Combine like terms: -1x + x = 0 x + xD = 800 + 0 x + xD = 800 Reorder the terms: -800 + x + xD = 800 + -800 Combine like terms: 800 + -800 = 0 -800 + x + xD = 0 The solution to this equation could not be determined.
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