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{x+y+z=651{y=(1+10%)z{x-y=5%y{x+y+z=651{y=(1+10%)z{x-y=5%y
题目详情
{x+y+z=651 {y=(1+10%)z {x-y=5%y
{x+y+z=651
{y=(1+10%)z
{x-y=5%y
{x+y+z=651
{y=(1+10%)z
{x-y=5%y
▼优质解答
答案和解析
分别将你的方程式从上到下看成（1）、（2）、（3）,由（3）得x=1.05y,由（2）得z=y/(1.1),代入（1）得
y=220,z=200,x=231
y=220,z=200,x=231
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