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