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Simplifying (R + -4)(r + 16) = 25 Reorder the terms: (-4 + R)(r + 16) = 25 Reorder the terms: (-4 + R)(16 + r) = 25 Multiply (-4 + R) * (16 + r) (-4(16 + r) + R(16 + r)) = 25 ((16 * -4 + r * -4) + R(16 + r)) = 25 ((-64 + -4r) + R(16 + r)) = 25 (-64 + -4r + (16 * R + r * R)) = 25 (-64 + -4r + (16R + rR)) = 25 Reorder the terms: (-64 + 16R + -4r + rR) = 25 (-64 + 16R + -4r + rR) = 25 Solving -64 + 16R + -4r + rR = 25 Solving for variable 'R'. Move all terms containing R to the left, all other terms to the right. Add '64' to each side of the equation. -64 + 16R + -4r + 64 + rR = 25 + 64 Reorder the terms: -64 + 64 + 16R + -4r + rR = 25 + 64 Combine like terms: -64 + 64 = 0 0 + 16R + -4r + rR = 25 + 64 16R + -4r + rR = 25 + 64 Combine like terms: 25 + 64 = 89 16R + -4r + rR = 89 Add '4r' to each side of the equation. 16R + -4r + 4r + rR = 89 + 4r Combine like terms: -4r + 4r = 0 16R + 0 + rR = 89 + 4r 16R + rR = 89 + 4r Reorder the terms: -89 + 16R + -4r + rR = 89 + 4r + -89 + -4r Reorder the terms: -89 + 16R + -4r + rR = 89 + -89 + 4r + -4r Combine like terms: 89 + -89 = 0 -89 + 16R + -4r + rR = 0 + 4r + -4r -89 + 16R + -4r + rR = 4r + -4r Combine like terms: 4r + -4r = 0 -89 + 16R + -4r + rR = 0 The solution to this equation could not be determined.
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