已知A/B/C=6;A/B-C=15;A-B=17.则A+B+C=( );AxBxC=( )

问题描述:

已知A/B/C=6;A/B-C=15;A-B=17.则A+B+C=( );AxBxC=( )

已知 A/B/C = 6 ,可得:A/B = 6C ;代入 A/B-C = 15 ,可得:6C-C = 15 ,解得:C = 3 ;则有:A/B = 6C = 18 ,可得:A = 18B ;代入 A = B+17 ,可得:18B = B+17 ,解得:B = 1 ;则有:A = 18B = 18 ;所以,A+B+C = 2...