Q1:2(2x-1)-5(2-3x)=-50
Q2:.2(x-9)-7(3x+2)=4(x-3)-6(3x-4)
完全唔明依條數點計==
2007-10-20 11:38 pm
回答 (4)
2007-10-20 11:44 pm
✔ 最佳答案
Q1 x=-2Q2 x=8.8
2007-10-20 11:49 pm
1. 2(2x-1)-5(2-3x)=-50
(4x-2)-(10-15x)=-50
4x-2-10+15x=-50
19x-12=-50
19x=-38
x=-2
2. 2(x-9)-7(3x+2)=4(x-3)-6(3x-4)
(2x-18)-(21x+14)=(4x-12)-(18x-24)
2x-18-21x-14=4x-12-18x+24
-19x-32=-14x+12
-19x+14x=12+32
-5x=44
x=-8.8
(4x-2)-(10-15x)=-50
4x-2-10+15x=-50
19x-12=-50
19x=-38
x=-2
2. 2(x-9)-7(3x+2)=4(x-3)-6(3x-4)
(2x-18)-(21x+14)=(4x-12)-(18x-24)
2x-18-21x-14=4x-12-18x+24
-19x-32=-14x+12
-19x+14x=12+32
-5x=44
x=-8.8
參考: myself,但第2題答案怪怪的,唔知有無錯~"~
2007-10-20 11:48 pm
Q1 2(2X-1)-5(2-3x)=-50
4x-2-10+15X=-50
19x-12=-50
19X=-38
X=-2
Q2 2(x-9)-7(3x+2)=4(x-3)-6(3x-4)
2x-18-21x-14 =4x-12-18x+24
-19x-32= -14x+12
-5x =44
x= 負5分之44
4x-2-10+15X=-50
19x-12=-50
19X=-38
X=-2
Q2 2(x-9)-7(3x+2)=4(x-3)-6(3x-4)
2x-18-21x-14 =4x-12-18x+24
-19x-32= -14x+12
-5x =44
x= 負5分之44
參考: 自己
2007-10-20 11:46 pm
4x-2-10+15x=-50
19x-12=-50
19x=-38
x=-2
2x-18-21x-14=4x-12-18x+24
-19x-32=-14x+12
-5x=42
x=-42/5
19x-12=-50
19x=-38
x=-2
2x-18-21x-14=4x-12-18x+24
-19x-32=-14x+12
-5x=42
x=-42/5
收錄日期: 2021-04-13 17:17:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071020000051KK02889