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Simplifying 4x + 7i = 18 + -21iy Reorder the terms: 7i + 4x = 18 + -21iy Solving 7i + 4x = 18 + -21iy Solving for variable 'i'. Move all terms containing i to the left, all other terms to the right. Add '21iy' to each side of the equation. 7i + 21iy + 4x = 18 + -21iy + 21iy Combine like terms: -21iy + 21iy = 0 7i + 21iy + 4x = 18 + 0 7i + 21iy + 4x = 18 Add '-4x' to each side of the equation. 7i + 21iy + 4x + -4x = 18 + -4x Combine like terms: 4x + -4x = 0 7i + 21iy + 0 = 18 + -4x 7i + 21iy = 18 + -4x Reorder the terms: -18 + 7i + 21iy + 4x = 18 + -4x + -18 + 4x Reorder the terms: -18 + 7i + 21iy + 4x = 18 + -18 + -4x + 4x Combine like terms: 18 + -18 = 0 -18 + 7i + 21iy + 4x = 0 + -4x + 4x -18 + 7i + 21iy + 4x = -4x + 4x Combine like terms: -4x + 4x = 0 -18 + 7i + 21iy + 4x = 0 The solution to this equation could not be determined.
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