解下列不等式:3(2x+5)>2(4x+3);10-4(4x-4)<或=2(x-1);x-3⼀2<2x-5⼀3;2x-1⼀3<或=3x-4⼀6;

5x+1⼀6-2&gt;x-5⼀4;y+1⼀6-2y-5⼀4&gt;或=1
2024-11-24 16:06:24
推荐回答(4个)
回答1:

3(2x+5)>2(4x+3);
解:6x+15>8x+6
2x<9
x<4.5

10-4(4x-4)<或=2(x-1);
解:10-16x+16<=2x-2(同分,公分数6)
26-16x<=2x-2
18x>=28
x>=14/9
x-3/2<2x-5/3;
解:6x-9<12x-10
6x>1
x>1/6
2x-1/3<或=3x-4/6;
解:2x-1/3<=3x-2/3
x>=1/3
5x+1/6-2>x-5/4;
解:5x-11/6>x-5/4
4x>11/6-5/4
48x>7/12
x>7/576
y+1/6-2y-5/4>或=1
解:y+1/6-2y>=9/4
4(y+1)>=9(6y-2)
4y+4>=54y-18
50y<=22
y<=11/25

回答2:

⑴x小于4.5
⑵x大于等于14/9
⑶x大于1/6
⑷x大于1/3
⑸x大于17/48
⑹y小于等于-25/12

回答3:

14\9<=x<9\2;y<-25\12.

回答4:

x<3