数学题(要过程)
7(y+5)-5(y-1)=0(写出检验过程)(x-1)/3=(x-2)/6-160%x-3*40%=(x+3)*50%2-(y-1)/2=(1+y)/33x-(x+2)...
7(y+5)-5(y-1)=0(写出检验过程)
(x-1)/3=(x-2)/6-1
60%x-3*40%=(x+3)*50%
2-(y-1)/2=(1+y)/3
3x-(x+2)=4(写出检验过程 )
(x-2)/6-1=(x-4)/4 展开
(x-1)/3=(x-2)/6-1
60%x-3*40%=(x+3)*50%
2-(y-1)/2=(1+y)/3
3x-(x+2)=4(写出检验过程 )
(x-2)/6-1=(x-4)/4 展开
1个回答
展开全部
1.7(y+5)-5(y-1)=0
7y+35=5y-5
7y-5y=-5-35
2y=-40
y=-20 检验:7(-20+5)-5(-20-1)=105-(-105)=0
2.(x-1)/3=(x-2)/6-1
x/3-1/3=x/6-1/3-1
x/3=x/6-1
x/3-x/6=-1
x/6=-1
x=-6
3. 60%x-3*40%=(x+3)*50%
0.6x-1.2=0.5x+1.5
0.6x-0.5x=1.5+1.2
0.1x=2.7
x=27
4. 2-(y-1)/2=(1+y)/3
[4-(y-1)]/2=(1+y)/3
3(4-y+1)=2+2y
9-3y=2+2y
5y=7
y=1.4
5. 3x-(x+2)=4
3x-x-2=4
2x=6
x=3 检验:3*3-(3+2)=9-5=4
6. (x-2)/6-1=(x-4)/4
[(x-2)-6]/6=(x-4)/4
2(x-2-6)=3(x-4)
2x-16=3X-12
2x-3x=16-12
x=-4
7y+35=5y-5
7y-5y=-5-35
2y=-40
y=-20 检验:7(-20+5)-5(-20-1)=105-(-105)=0
2.(x-1)/3=(x-2)/6-1
x/3-1/3=x/6-1/3-1
x/3=x/6-1
x/3-x/6=-1
x/6=-1
x=-6
3. 60%x-3*40%=(x+3)*50%
0.6x-1.2=0.5x+1.5
0.6x-0.5x=1.5+1.2
0.1x=2.7
x=27
4. 2-(y-1)/2=(1+y)/3
[4-(y-1)]/2=(1+y)/3
3(4-y+1)=2+2y
9-3y=2+2y
5y=7
y=1.4
5. 3x-(x+2)=4
3x-x-2=4
2x=6
x=3 检验:3*3-(3+2)=9-5=4
6. (x-2)/6-1=(x-4)/4
[(x-2)-6]/6=(x-4)/4
2(x-2-6)=3(x-4)
2x-16=3X-12
2x-3x=16-12
x=-4
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询