问题标题:
【一元一次方程,一小时内求解决,1.7(2x-1)-3(4x-1)=4(3x+2)-1;2.(5y+1)+(1-y)=(9y+1)+(1-3y);3.20%+(1-20%)(320-x)=320×40%4.2(x-2)+2=x+15.2(x-2)-3(4x-1)=9(1-x)6.11x+64-2x=100-9x7.15-(8-5x)=7x+(4-3x)8.3(x-7)-2[9-4(2-x)]=229.3/2[2/3(1/4x-1)-2]-】
问题描述:
一元一次方程,一小时内求解决,
1.7(2x-1)-3(4x-1)=4(3x+2)-1;
2.(5y+1)+(1-y)=(9y+1)+(1-3y);
3.20%+(1-20%)(320-x)=320×40%
4.2(x-2)+2=x+1
5.2(x-2)-3(4x-1)=9(1-x)
6.11x+64-2x=100-9x
7.15-(8-5x)=7x+(4-3x)
8.3(x-7)-2[9-4(2-x)]=22
9.3/2[2/3(1/4x-1)-2]-x=2
10.2x-10.3x=15
11.0.52x-(1-0.52)x=80
12.x/2+3x/2=7
13.3x+7=32-2x
14.3x+5(138-x)=540
15.3x-7(x-1)=3-2(x+3)
16.18x+3x-3=18-2(2x-1)
17.3(20-y)=6y-4(y-11)
18.-(x/4-1)=5
19.3[4(5y-1)-8]=6
20.10/3(x/5+3/7)=9x/2
21.5/3(x+0.5)+2=3x-6
22.5x+2(2x/3+2)=2/3(x-6)+2
23.(2x-7)/2-(6x-5)/3=2x+3
24.(3x+2)/5-(x-6)=x/3
25.6x-(x/3+2)=2(x/5+5/2)-3
26.3(x/11-2)-5=2+3x/3
27.10/3(2x-6)=3/5
28.x/2-(x/3-2)=3
29.2/3(x+3)-3=5x/3
30.5/3(2x-5/3)=2x/5-8/9
31.25(x/3-x/2+2/5)-2=3/5(x-2/7)+4/9
马缚龙回答:
第10个有问题,看看题对吗?
18.-(x/4-1)=5
-x/4+1=5
-x/4=4
x=-16
19.3[4(5y-1)-8]=6
3(20y-4-8)=6
20y-12=2
20y=14
y=10/7
20.10/3(x/5+3/7)=9x/2
x/5+3/7=9x/2*3/10=27x/20
x/5-27x/20=-3/7
-23x/20=-3/7
x=3/7*20/23=60/161
21.5/3(x+0.5)+2=3x-6
5/3x+5/6+2=3x-6
-4x/3=-8-5/6=-53/6
x=53/8
22.5x+2(2x/3+2)=2/3(x-6)+2
5x+4x/3+4=2x/3-2
5x+2x/3=-6
17x/3=-6
x=-18/17
23.(2x-7)/2-(6x-5)/3=2x+3
x-7/2-2x+5/3=2x+3
-3x-11/6=3
-3x=29/6
x=-29/18
24.(3x+2)/5-(x-6)=x/3
(3x+2)/5-(x-6)=x/3
3(3x+2)-15(x-6)=5x
9x+6-15x+90-5x=0
-11x+96=0
-11x=-96
x=96/11
25.6x-(x/3+2)=2(x/5+5/2)-3
6x-x/3-2x/5=-2+5-3=0
x(6-1/3-2/5)=0
x=0
26.3(x/11-2)-5=2+3x/3
3x/11-6-5=2+x
3x/11-x=13
-8x/11=13
x=-143/8
27.10/3(2x-6)=3/5
10X5=3(2x-6)X3
50=18x-54
104=18x
x=52/9
28.x/2-(x/3-2)=3
x/6+2=3
x/6=1
x=6
29.2/3(x+3)-3=5x/3
2(x+3)-9=5x
2x+6-9=5x
-3x=3
x=-1
30.5/3(2x-5/3)=2x/5-8/9
75(2x-5/3)=18x-40
150x-125=18x-40
132x=85
x=85/132
31.25(x/3-x/2+2/5)-2=3/5(x-2/7)+4/9
25(2/5-x/6)=3x/5-6/35+4/9
10-25x/6=3x/5+11/35
-25x/6-3x/5=361/35
-143x/30=361/35
x=361*6/7*143
太麻烦了采纳吧!
马骊溟回答:
应该是对的,做错也不要紧,只要不错太多
马缚龙回答:
10.2x-10.3x=15
-8.3x=15
x=15/-8.3=-150/83
马骊溟回答:
好的,十分感谢,悬赏我会以提问形式放出,不含之前的悬赏,到时候私信通知亲,我说到一定会做到的。
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