x - 2 y + z = 10 y + 2 z = 4 x + y + 3 z = 10 x= [BLANK-1] y= [BLANK-2] z= [BLANK-3]
A Grаm-negаtive bаcillus isоlated frоm a urinary tract infectiоn is found to be urease-positive, oxidase-negative, lactose non-fermenting, and motile. What combination of tests would best differentiate this isolate from Klebsiella pneumoniae?