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Simplifying (X + -1) * Dx + (y + -1X) * dy = 0 Reorder the terms: (-1 + X) * Dx + (y + -1X) * dy = 0 Reorder the terms for easier multiplication: xD(-1 + X) + (y + -1X) * dy = 0 (-1 * xD + X * xD) + (y + -1X) * dy = 0 (-1xD + xDX) + (y + -1X) * dy = 0 Reorder the terms: -1xD + xDX + (-1X + y) * dy = 0 Reorder the terms for easier multiplication: -1xD + xDX + dy(-1X + y) = 0 -1xD + xDX + (-1X * dy + y * dy) = 0 -1xD + xDX + (-1dyX + dy2) = 0 Reorder the terms: -1dyX + dy2 + -1xD + xDX = 0 Solving -1dyX + dy2 + -1xD + xDX = 0 Solving for variable 'd'. Move all terms containing d to the left, all other terms to the right. Add 'xD' to each side of the equation. -1dyX + dy2 + -1xD + xD + xDX = 0 + xD Combine like terms: -1xD + xD = 0 -1dyX + dy2 + 0 + xDX = 0 + xD -1dyX + dy2 + xDX = 0 + xD Remove the zero: -1dyX + dy2 + xDX = xD Add '-1xDX' to each side of the equation. -1dyX + dy2 + xDX + -1xDX = xD + -1xDX Combine like terms: xDX + -1xDX = 0 -1dyX + dy2 + 0 = xD + -1xDX -1dyX + dy2 = xD + -1xDX Reorder the terms: -1dyX + dy2 + -1xD + xDX = xD + -1xD + -1xDX + xDX Combine like terms: xD + -1xD = 0 -1dyX + dy2 + -1xD + xDX = 0 + -1xDX + xDX -1dyX + dy2 + -1xD + xDX = -1xDX + xDX Combine like terms: -1xDX + xDX = 0 -1dyX + dy2 + -1xD + xDX = 0 The solution to this equation could not be determined.
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