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Solve the following simultaneous equations.
1.2c+5d=27..........(1)
c+2d=9.............(2)
2.m-n=2.......(1)
m+3n=14......(2)
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Method of substitution
2013-01-27 7:25 pm
回答 (1)
2013-01-27 7:37 pm
✔ 最佳答案
Solve the following simultaneous equations.1.2c+5d=27..........(1)
c+2d=9.............(2)
2.m-n=2.......(1)
m+3n=14......(2)
(1)From 2, c+9-2d....3
sub 3 into 1
2(9-2d)+5d=27
d=9
sub d=9 into 3
c=9-2(9)
c=-9
(2)from 1,m=2+n.....3
sub 3 into 2,2+n+3n=14
n=3
sub n=3 into 3
m=5
參考: me
收錄日期: 2021-04-13 19:16:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130127000051KK00083