\u4e00\u4e2a\u5e03\u888b\u4e2d\u88c5\u6709\u7ea2\u3001\u9ec4\u3001\u84dd\u3001\u4e09\u79cd\u989c\u8272\u7684\u5927\u5c0f\u76f8\u540c\u7684\u6728\u7403\uff0c\u7ea2\u7403\u4e0a\u6807\u6709\u6570\u5b571\uff0c\u9ec4\u7403\u4e0a\u6807\u6709\u6570\u5b572\uff0c\u84dd\u7403\u4e0a\u6807\u6709\u6570

\u8bbe\u5c0f\u660e\u6478\u51fa\u768410\u4e2a\u7403\u4e2d\u6709x\u4e2a\u7ea2\u7403\uff0cy\u4e2a\u9ec4\u7403\uff0cz\u4e2a\u84dd\u7403\uff0e\u4f9d\u9898\u610f\u5217\u5f97\u65b9\u7a0b\u7ec4\uff1ax+y+z\uff1d10\u24601?x+2?y+3?z\uff1d21\u2461\u2460\u00d73-\u2461\u5f97 2x+y=9\uff0c\u5373y=9-2x\uff0e\u7531\u4e8ey\u662f\u975e\u8d1f\u6574\u6570\uff0cx\u4e5f\u662f\u975e\u8d1f\u6574\u6570\uff0e\u6613\u77e5x\u7684\u6700\u5927\u503c\u662f4\uff0e\u5373\u5c0f\u660e\u6478\u51fa\u768410\u4e2a\u7403\u4e2d\u81f3\u591a\u67094\u4e2a\u7ea2\u7403\uff0e\u6545\u7b54\u6848\u4e3a\uff1a4\uff0e

\u6211\u5047\u8bbe\u84dd\u8272\u7403\u6709x\u4e2a\uff0c\u9ec4\u8272\u7403\u6709y\u4e2a\uff0c\u90a3\u4e48\u7ea2\u8272\u7403\u5c31\u662f(10-x-y)\u4e2a
\u5219\uff1a3*x+2*y+(10-x-y)=21
\u7b80\u5316\u4e3a2x+y=11
\u5e26\u5165\u6570\u5b57\u8fdb\u5165\u8ba1\u7b97\uff1a
2*5+1=11 \uff08\u4e94\u4e2a\u84dd\u8272\u7403\uff0c\u4e00\u4e2a\u9ec4\u8272\u7403\uff0c\u56db\u4e2a\u7ea2\u8272\u7403\uff09
2*4+3=11 \uff08\u56db\u4e2a\u84dd\u8272\u7403\uff0c\u4e09\u4e2a\u9ec4\u8272\u7403\uff0c\u4e09\u4e2a\u7ea2\u8272\u7403\uff09
2*3+5=11 \uff08\u4e09\u4e2a\u84dd\u8272\u7403\uff0c\u4e94\u4e2a\u9ec4\u8272\u7403\uff0c\u4e24\u4e2a\u7ea2\u8272\u7403\uff09
2*2+7=11 \uff08\u4e24\u4e2a\u84dd\u8272\u7403\uff0c\u4e03\u4e2a\u9ec4\u8272\u7403\uff0c\u4e00\u4e2a\u7ea2\u8272\u7403\uff09
2*1+9=11 \uff08\u4e00\u4e2a\u84dd\u8272\u7403\uff0c\u4e5d\u4e2a\u9ec4\u8272\u7403\uff0c\u6ca1\u6709\u7ea2\u8272\u7403\uff09

\u6240\u4ee5\u7ea2\u8272\u7403\u6700\u591a\u4e3a4\u4e2a