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Prove that if x.y, and z cre integers and x+y+: is odd. then at least one of x, y, and z is odd. Use the

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Prove that if x.y, and z cre integers and x+y+: is odd. then at least one of x, y, and z is odd. Use the proof by cases to prove that there are no solutions in integers x and y to the equation 4x2 +3y = 20 or find such integer solution

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