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3. Let x=10,y=2 and z=1. Find the truth values of the following statements: You have to justify your answer. (210=20) a) If (xyz2y+3=10), then (xy+2z=19)

3. Let x=10,y=2 and z=1. Find the truth values of the following statements: You have to justify your answer. (210=20) a) If (xyz2y+3=10), then (xy+2z=19) b) (x+y2+z=14)(x2+y2+z3=152)

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