急用!帮忙解一下方程组,太感谢了! 哪位好心人帮帮忙 20
8a+255b+198c=7500255a+8775b+5970c=240100168a+5970b+5482c=185600...
8a+255b+198c=7500
255a+8775b+5970c=240100
168a+5970b+5482c=185600 展开
255a+8775b+5970c=240100
168a+5970b+5482c=185600 展开
1个回答
展开全部
8a+255b+198c=7500 (1)
255a+8775b+5970c=240100 ( 2)
168a+5970b+5482c=185600 (3)
(1)变为168a+5335b+4158c=157500 (4)
(3)-(4) 615b+1324c=28100 (5)
(1)变为255a+8160b+6336c=240000 (6)
(2)-(6) 615b-546c=54500 (7)
(5)-(7) 1870c=-76400 c=-14
把c=-14代入(5)则b=76
把b=76和c=-14代入(1)则a=-1239
数太大,都是约等于
255a+8775b+5970c=240100 ( 2)
168a+5970b+5482c=185600 (3)
(1)变为168a+5335b+4158c=157500 (4)
(3)-(4) 615b+1324c=28100 (5)
(1)变为255a+8160b+6336c=240000 (6)
(2)-(6) 615b-546c=54500 (7)
(5)-(7) 1870c=-76400 c=-14
把c=-14代入(5)则b=76
把b=76和c=-14代入(1)则a=-1239
数太大,都是约等于
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