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Simplifying D(x) = x + 7 Multiply D * x xD = x + 7 Reorder the terms: xD = 7 + x Solving xD = 7 + x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1x' to each side of the equation. -1x + xD = 7 + x + -1x Combine like terms: x + -1x = 0 -1x + xD = 7 + 0 -1x + xD = 7 Reorder the terms: -7 + -1x + xD = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + -1x + xD = 0 The solution to this equation could not be determined.
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