緊急急急．．．．
use the method of elimination to solve the simultaneous equations.
1. 2z+3y/6=6x-y/3=4
2(a). 0x-6y=11...............(1)
8x+9y=12...............(2)
b.using the result of 2(a),solve the simultaneous equations.
20/a-6(b-1)=11............(1)
8/a+9(b-1)=12.............(2)
唔識math....simultaneous equations（緊急）
2008-02-20 3:25 am
回答 (1)
2008-02-20 6:29 am
✔ 最佳答案
2a.-6x=11------(1)8x+9y=12-----(2)
from(1)
y=11/-6-----(3)
sub(3)into (2)
8x+9(11/-6)=12
8x=33/2
x=33/16
sub x=33/16 into(2)
8(33/16)+9y=12
9y=33/2
y=11/6
參考: me
收錄日期: 2021-04-13 15:11:00
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https://hk.answers.yahoo.com/question/index?qid=20080219000051KK02684