急 !!求步驟同埋答案

2007-01-04 12:35 am
1.4x-x+3=2x-1
2.2x+3x-5=x+11
3.8+5x-3x=12-2x
4.10-3x= -5x+8+x
5.7(x+1)-2(3x-2)=2(x+4)
6.14(1-y)=2(1-6y)+2(5-2y)

回答 (3)

2007-01-04 12:49 am
1.4x-x+3=2x-1
3x+3=2x-1
3x-2x=-3-1
x=-4
2.2x+3x-5=x+11
5x-5 =x+11
5x-x=5+11
4x=16
x=5
3.8+5x-3x=12-2x
8+2x=12-2x
2x+2x=12-8
4x=4
x=1
4.10-3x= -5x+8+x
10-3x=-4x+8
10-8 =-4x+3x
2 = x
2=x

5.7(x+1)-2(3x-2)=2(x+4)
7x+7-6x+4=2x+8
x+11=2x+8
x-2x =-11+8
-x =-3
x=3
6. 14(1-y)=2(1-6y)+2(5-2y)
14-14y=2-12y+10-4y
-14y+12y+4y=2+10-14
2y =-2
y=-1
2007-01-04 12:46 am
1)4x-x+3=2x-1
3x+3=2x-1
3x-2x=-1-3
x=-4


2)2x+3x-5=x+11
5x-5=x+11
5x-x=11+5
4x=16
x=4


3)8+5x-3x=12-2x
8+2x=12-2x
2x+2x=12-8
4x=4
x=1


4)10-3x= -5x+8+x
10-3x=-4x+8
-3x+4x=8-10
x=-2


5)7(x+1)-2(3x-2)=2(x+4)
7x+7-6x-4=2x+8
x+3=2x+8
x-2x=8-3
-x=5
x=-5


6)14(1-y)=2(1-6y)+2(5-2y)
14-14y=2-12y+10-4y
-14y+12y+4y=2+10-14
2y=-2
y=-1
參考: me
2007-01-04 12:43 am
1.4x-x+3=2x-1
3x+3=2x-1
3x-2x=-1-3
x=-4


2.2x+3x-5=x+11
5x-5=x+11
5x-x=11+5
4x=16
x=4


3.8+5x-3x=12-2x
8+2x=12-2x
2x+2x=12-8
4x=4
x=1


4.10-3x= -5x+8+x
10-3x=-4x+8
-3x+4x=8-10
x=-2


5.7(x+1)-2(3x-2)=2(x+4)
7x+7-6x-4=2x+8
x+3=2x+8
x-2x=8-3
-x=5
x=-5


6.14(1-y)=2(1-6y)+2(5-2y)
14-14y=2-12y+10-4y
-14y+12y+4y=2+10-14
2y=-2
y=-1


收錄日期: 2021-04-23 16:30:39
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