更新1:
問一元一次的不等式 1.-6x+x>9x+58 2.11(x+4)-19<6x 3.8(x-1)<-4x+16 希望高手解?
問一元一次的不等式 -6x+x>9x+58 11(x+4)-19<6x 8(x-1)<-4x+16 希望高手解?
回答 (2)
2015-09-09 4:51 pm
1.
-6x + x > 9x + 58
-5x > 9x + 58
-5x - 9x > 9x + 58 - 9x
-14x > 58
-14x/(-14) < 58/(-14)
x < -29/7 ...... (答案)
2.
11(x + 4) - 19 < 6x
11x + 44 - 19 < 6x
11x + 25 < 6x
11x + 25 - 6x - 25 < 6x - 6x - 25
5x < -25
5x/5 < -25/5
x < -5
3.
8(x - 1) < -4x + 16
8x - 8 < -4x + 16
8x - 8 + 4x + 8 < -4x + 16 +4x + 8
12x < 24
12x/12 < 24/12
x < 2
-6x + x > 9x + 58
-5x > 9x + 58
-5x - 9x > 9x + 58 - 9x
-14x > 58
-14x/(-14) < 58/(-14)
x < -29/7 ...... (答案)
2.
11(x + 4) - 19 < 6x
11x + 44 - 19 < 6x
11x + 25 < 6x
11x + 25 - 6x - 25 < 6x - 6x - 25
5x < -25
5x/5 < -25/5
x < -5
3.
8(x - 1) < -4x + 16
8x - 8 < -4x + 16
8x - 8 + 4x + 8 < -4x + 16 +4x + 8
12x < 24
12x/12 < 24/12
x < 2
2015-12-04 3:01 pm
-6x+x>9x+58
-58>14x
x<29/7
11(x+4)-19<6x
11x+25<6x
5x<-25
x<-5
8(x - 1) < -4x + 16
12x<24
x<2
-58>14x
x<29/7
11(x+4)-19<6x
11x+25<6x
5x<-25
x<-5
8(x - 1) < -4x + 16
12x<24
x<2
收錄日期: 2021-04-18 00:13:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20150909081417AAVv7LG