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Simplifying r(z2 + 7) + -1(z2 + 7) = 0 Reorder the terms: r(7 + z2) + -1(z2 + 7) = 0 (7 * r + z2 * r) + -1(z2 + 7) = 0 (7r + rz2) + -1(z2 + 7) = 0 Reorder the terms: 7r + rz2 + -1(7 + z2) = 0 7r + rz2 + (7 * -1 + z2 * -1) = 0 7r + rz2 + (-7 + -1z2) = 0 Reorder the terms: -7 + 7r + rz2 + -1z2 = 0 Solving -7 + 7r + rz2 + -1z2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7r + rz2 + 7 + -1z2 = 0 + 7 Reorder the terms: -7 + 7 + 7r + rz2 + -1z2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 7r + rz2 + -1z2 = 0 + 7 7r + rz2 + -1z2 = 0 + 7 Combine like terms: 0 + 7 = 7 7r + rz2 + -1z2 = 7 Add 'z2' to each side of the equation. 7r + rz2 + -1z2 + z2 = 7 + z2 Combine like terms: -1z2 + z2 = 0 7r + rz2 + 0 = 7 + z2 7r + rz2 = 7 + z2 Reorder the terms: -7 + 7r + rz2 + -1z2 = 7 + z2 + -7 + -1z2 Reorder the terms: -7 + 7r + rz2 + -1z2 = 7 + -7 + z2 + -1z2 Combine like terms: 7 + -7 = 0 -7 + 7r + rz2 + -1z2 = 0 + z2 + -1z2 -7 + 7r + rz2 + -1z2 = z2 + -1z2 Combine like terms: z2 + -1z2 = 0 -7 + 7r + rz2 + -1z2 = 0 The solution to this equation could not be determined.
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