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There are many benefits to timing your practice, including:
stmt1: x = 8 => 8-y >10 => y<-2 so x - y is always going to be greater than 10 and x+y is always going to be less than 6 hence x-y>x+y proved stmt2: y = -20 => x+20>10=> x>-10 => x-y is always greater than 10 and x+y is always greater than -30 so how this is suff? _________________