甲乙丙三个数的和是300,甲数是120,丙数是乙数的五分之四,丙数是A.80 B.100 C.180

问题描述:

甲乙丙三个数的和是300,甲数是120,丙数是乙数的五分之四,丙数是
A.80 B.100 C.180