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Simplifying (R + 7)(r + -4) = 0 Reorder the terms: (7 + R)(r + -4) = 0 Reorder the terms: (7 + R)(-4 + r) = 0 Multiply (7 + R) * (-4 + r) (7(-4 + r) + R(-4 + r)) = 0 ((-4 * 7 + r * 7) + R(-4 + r)) = 0 ((-28 + 7r) + R(-4 + r)) = 0 (-28 + 7r + (-4 * R + r * R)) = 0 (-28 + 7r + (-4R + rR)) = 0 Reorder the terms: (-28 + -4R + 7r + rR) = 0 (-28 + -4R + 7r + rR) = 0 Solving -28 + -4R + 7r + rR = 0 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '28' to each side of the equation. -28 + -4R + 7r + 28 + rR = 0 + 28 Reorder the terms: -28 + 28 + -4R + 7r + rR = 0 + 28 Combine like terms: -28 + 28 = 0 0 + -4R + 7r + rR = 0 + 28 -4R + 7r + rR = 0 + 28 Combine like terms: 0 + 28 = 28 -4R + 7r + rR = 28 Add '-7r' to each side of the equation. -4R + 7r + -7r + rR = 28 + -7r Combine like terms: 7r + -7r = 0 -4R + 0 + rR = 28 + -7r -4R + rR = 28 + -7r Reorder the terms: -28 + -4R + 7r + rR = 28 + -7r + -28 + 7r Reorder the terms: -28 + -4R + 7r + rR = 28 + -28 + -7r + 7r Combine like terms: 28 + -28 = 0 -28 + -4R + 7r + rR = 0 + -7r + 7r -28 + -4R + 7r + rR = -7r + 7r Combine like terms: -7r + 7r = 0 -28 + -4R + 7r + rR = 0 The solution to this equation could not be determined.
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