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Simplifying r(z4 + -18) + (z4 + -18) = 0 Reorder the terms: r(-18 + z4) + (z4 + -18) = 0 (-18 * r + z4 * r) + (z4 + -18) = 0 (-18r + rz4) + (z4 + -18) = 0 Reorder the terms: -18r + rz4 + (-18 + z4) = 0 Remove parenthesis around (-18 + z4) -18r + rz4 + -18 + z4 = 0 Reorder the terms: -18 + -18r + rz4 + z4 = 0 Solving -18 + -18r + rz4 + z4 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '18' to each side of the equation. -18 + -18r + rz4 + 18 + z4 = 0 + 18 Reorder the terms: -18 + 18 + -18r + rz4 + z4 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + -18r + rz4 + z4 = 0 + 18 -18r + rz4 + z4 = 0 + 18 Combine like terms: 0 + 18 = 18 -18r + rz4 + z4 = 18 Add '-1z4' to each side of the equation. -18r + rz4 + z4 + -1z4 = 18 + -1z4 Combine like terms: z4 + -1z4 = 0 -18r + rz4 + 0 = 18 + -1z4 -18r + rz4 = 18 + -1z4 Reorder the terms: -18 + -18r + rz4 + z4 = 18 + -1z4 + -18 + z4 Reorder the terms: -18 + -18r + rz4 + z4 = 18 + -18 + -1z4 + z4 Combine like terms: 18 + -18 = 0 -18 + -18r + rz4 + z4 = 0 + -1z4 + z4 -18 + -18r + rz4 + z4 = -1z4 + z4 Combine like terms: -1z4 + z4 = 0 -18 + -18r + rz4 + z4 = 0 The solution to this equation could not be determined.
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