6x-5y=600 5x-6y=60

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6x-5y=6005x-6y=606x-5y=6005x-6y=606x-5y=6005x-6y=601式乘5-2式乘6得11y=2640y=240x=300x=300y=240用（6X-5Y)*5=

6x-5y=600 5x-6y=60
6x-5y=600 5x-6y=60

6x-5y=600 5x-6y=60
1式乘5-2式乘6得11y=2640
y=240
x=300

x=300 y=240

用（6X-5Y)*5=600*5即30X-25Y=3000用@表示
(5X-6Y)*6=60*6即30X-36Y=360用&表示
用@-&即可得到 11Y=2640即Y=240
然后用Y=240代入@的中，就可以得到X=300

将方程6x-5y=600 化为x=（600+5y）/6=100+5y/6
把x带入方程5x-6y=60中得到结果x=300，y=240

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