１）4(3-x)-5(x-4)=3(5-x)-7
２）(x-1)/3 + (x+1)/4=1/6
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2007-12-30 12:48 am
回答 (6)
2007-12-30 12:55 am
✔ 最佳答案
１）4(3-x)-5(x-4)=3(5-x)-712-4x-5x+20=15-3x-7
-9x+32=8-3x
24=6x
x=4
２）(x-1)/3 + (x+1)/4=1/6
12*(x-1)/3+12*(x+1)/4=12*1/6
4x-4+3x+3=2
7x-1=2
x=3/7
2007-12-30 6:11 am
2) (x-1)/3+(x+1)/4=1/6
4x-4+3x+3=2
3=7x
1/7 =x
4x-4+3x+3=2
3=7x
1/7 =x
2007-12-30 1:07 am
1）4(3-x)-5(x-4)=3(5-x)-7
12-4x-5x+20=15-3x-7
12+20-4x-5x=15-7-3x
32-9x=8-3x
32-8=9x-3x
24=6x
24/6=x
x=4
2) (x-1)/3 + (x+1)/4=1/6
4【(x-1)/3】+ 3【(x+1)/4】=1/6
4(x-1)/12+3(x-1)/12 =1/6
4x-4+3x+3/12 =1/6
4x+3x-4+3 =(1/6)(12)
7x-1=2
7x=2+1
x=3/7
12-4x-5x+20=15-3x-7
12+20-4x-5x=15-7-3x
32-9x=8-3x
32-8=9x-3x
24=6x
24/6=x
x=4
2) (x-1)/3 + (x+1)/4=1/6
4【(x-1)/3】+ 3【(x+1)/4】=1/6
4(x-1)/12+3(x-1)/12 =1/6
4x-4+3x+3/12 =1/6
4x+3x-4+3 =(1/6)(12)
7x-1=2
7x=2+1
x=3/7
參考: me
2007-12-30 1:01 am
1) 4(3-x)-5(x-4)=3(5-x)-7
12-4x-5x+20=15-3x-7
12-15+7+20=-3x+4x+5x
24=6x
x=4
2) (x-1)/3+(x+1)/4=1/6
4x-4+3x+3=2
4x+3x=2-3+4
7x=3
x=1/7
12-4x-5x+20=15-3x-7
12-15+7+20=-3x+4x+5x
24=6x
x=4
2) (x-1)/3+(x+1)/4=1/6
4x-4+3x+3=2
4x+3x=2-3+4
7x=3
x=1/7
參考: ME
2007-12-30 12:59 am
1) 12-4X-5X+20=15-3X-7
32-9x=8-3x
24=6x
x=4
2) [4(x-1)+3(x+1)]/12=1/6
4x-4+3x+3=2
7x-1=2
x=3/7
32-9x=8-3x
24=6x
x=4
2) [4(x-1)+3(x+1)]/12=1/6
4x-4+3x+3=2
7x-1=2
x=3/7
參考: ME
2007-12-30 12:58 am
1)
4(3-x)-5(x-4)=3(5-x)-7
12-4x-5x-20=15-3x-7
12-20-4x-5x=15-7-3x
..................
4(3-x)-5(x-4)=3(5-x)-7
12-4x-5x-20=15-3x-7
12-20-4x-5x=15-7-3x
..................
參考: HOPE CAN HELP U
收錄日期: 2021-04-19 00:09:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071229000051KK02944