甲乙丙三个数的平均数是70甲乙丙三个数的比是4比6比5这三个数是多少
问答/190℃/2025-01-22 21:58:06
优质解答：
设甲乙丙为x,y,z
x+y+z=70*3=210
x:y:z=4:6:5
x:z=4:5 x=0.8z
y:z=6:5 y=1.2z
0.8z+1.2z+z=70 z=70
x=56
y=84
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