a+b+c=100,a=b+c,b=2c.求abc的值

a+b+c=100,a=b+c,b=2c.求abc的值
a+b+c=100,a=b+c,b=2c.求abc的值

a+b+c=100,a=b+c,b=2c.求abc的值
a=100÷2=50
c=100÷2÷(1+2)=50/3
b=50/3×2=100/3

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a=3c
6c=100
c=50/3
a=50
b=100/3

a=50,b=100/3,c=50/3,abc=250000/9

因A=B+C
a+b+c=b+c+b+c=2B+2C
又因B=2C
2B+2C=4C+2C=6C=100

4C+3C+c=100