数学题(解下列方程组)a:b:c=3:4:5a+b+c=36

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数学题(解下列方程组)a:b:c=3:4:5a+b+c=36数学题(解下列方程组)a:b:c=3:4:5a+b+c=36数学题(解下列方程组)a:b:c=3:4:5a+b+c=36a:b:c=3:4:

数学题(解下列方程组)a:b:c=3:4:5a+b+c=36
数学题(解下列方程组)
a:b:c=3:4:5
a+b+c=36

数学题(解下列方程组)a:b:c=3:4:5a+b+c=36
a:b:c=3:4:5 a+b+c=36 设a/3=b/4=c/5=k a=3k,b=4k,c=5k 代入a+b+c=36 3k+4k+5k=36 k=3 a=3k=9 b=4k=12 c=5k=15 解得:a=9 b=12 c=15