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Simplifying (x + 2y)(x + 7y) = 4 Multiply (x + 2y) * (x + 7y) (x(x + 7y) + 2y * (x + 7y)) = 4 ((x * x + 7y * x) + 2y * (x + 7y)) = 4 Reorder the terms: ((7xy + x2) + 2y * (x + 7y)) = 4 ((7xy + x2) + 2y * (x + 7y)) = 4 (7xy + x2 + (x * 2y + 7y * 2y)) = 4 (7xy + x2 + (2xy + 14y2)) = 4 Reorder the terms: (7xy + 2xy + x2 + 14y2) = 4 Combine like terms: 7xy + 2xy = 9xy (9xy + x2 + 14y2) = 4 Solving 9xy + x2 + 14y2 = 4 Solving for variable 'x'. Reorder the terms: -4 + 9xy + x2 + 14y2 = 4 + -4 Combine like terms: 4 + -4 = 0 -4 + 9xy + x2 + 14y2 = 0 The solution to this equation could not be determined.
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