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Simplifying r(z4 + 9) + -1(z4 + 9) = 0 Reorder the terms: r(9 + z4) + -1(z4 + 9) = 0 (9 * r + z4 * r) + -1(z4 + 9) = 0 (9r + rz4) + -1(z4 + 9) = 0 Reorder the terms: 9r + rz4 + -1(9 + z4) = 0 9r + rz4 + (9 * -1 + z4 * -1) = 0 9r + rz4 + (-9 + -1z4) = 0 Reorder the terms: -9 + 9r + rz4 + -1z4 = 0 Solving -9 + 9r + rz4 + -1z4 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9r + rz4 + 9 + -1z4 = 0 + 9 Reorder the terms: -9 + 9 + 9r + rz4 + -1z4 = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 9r + rz4 + -1z4 = 0 + 9 9r + rz4 + -1z4 = 0 + 9 Combine like terms: 0 + 9 = 9 9r + rz4 + -1z4 = 9 Add 'z4' to each side of the equation. 9r + rz4 + -1z4 + z4 = 9 + z4 Combine like terms: -1z4 + z4 = 0 9r + rz4 + 0 = 9 + z4 9r + rz4 = 9 + z4 Reorder the terms: -9 + 9r + rz4 + -1z4 = 9 + z4 + -9 + -1z4 Reorder the terms: -9 + 9r + rz4 + -1z4 = 9 + -9 + z4 + -1z4 Combine like terms: 9 + -9 = 0 -9 + 9r + rz4 + -1z4 = 0 + z4 + -1z4 -9 + 9r + rz4 + -1z4 = z4 + -1z4 Combine like terms: z4 + -1z4 = 0 -9 + 9r + rz4 + -1z4 = 0 The solution to this equation could not be determined.
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