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Simplifying -1((4rs + -5(r + 4s)) + -4(4r2 + -1s)) = x -1((4rs + (r * -5 + 4s * -5)) + -4(4r2 + -1s)) = x -1((4rs + (-5r + -20s)) + -4(4r2 + -1s)) = x Reorder the terms: -1((-5r + 4rs + -20s) + -4(4r2 + -1s)) = x Remove parenthesis around (-5r + 4rs + -20s) -1(-5r + 4rs + -20s + -4(4r2 + -1s)) = x -1(-5r + 4rs + -20s + (4r2 * -4 + -1s * -4)) = x -1(-5r + 4rs + -20s + (-16r2 + 4s)) = x Reorder the terms: -1(-5r + 4rs + -16r2 + -20s + 4s) = x Combine like terms: -20s + 4s = -16s -1(-5r + 4rs + -16r2 + -16s) = x (-5r * -1 + 4rs * -1 + -16r2 * -1 + -16s * -1) = x (5r + -4rs + 16r2 + 16s) = x Solving 5r + -4rs + 16r2 + 16s = x Solving for variable 'r'. Combine like terms: x + -1x = 0 5r + -4rs + 16r2 + 16s + -1x = 0 The solution to this equation could not be determined.
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