Solve for x....?

👨🏻‍🏫 學術台數學

[匿名]

2008-03-23 7:00 am

6(x-6)+6=8(x+2)-6

x=

Thank you in advance

更新1:

Also.... 5(x+4)=7(x-2) x=

更新2:

Thank you mike.... was wondering why every answer was different....

回答 (9)

Como

2008-03-23 10:29 am

✔ 最佳答案

Question 1
6x - 36 + 6 = 8x + 16 - 6
6x - 30 = 8x + 10
- 40 = 2x
x = - 20

Question 2
5x + 20 = 7x - 14
34 = 2x
x = 17

👍 1 👎 0

[匿名]

2008-03-23 7:03 am

x= -16
x= 12

👍 1 👎 1

[匿名]

2008-03-23 7:03 am

x=-1

參考: kmdn

👍 1 👎 3

[匿名]

2008-03-23 7:22 am

Okay, so you multiply 6 with x, and get 6x. Then you multiply 6 by -6 and get -36 and you add 6 to -36 and get 6x-30. subtract 30 from 6x and the first part of the equation will be 6x-30. you do the same thing you did except you will get 8x+10. then you subtract 6x from both sides and get -30=2x+10, then you subtract 10 from each side and get -40=2x x=-20

therefore, x=-20

the second one, the answer is x=17

👍 0 👎 0

papaw

2008-03-23 7:11 am

6(x-6) + 6 = 8(x + 2) -6
1) Multiply and cleasr out the parentheses

6x - 36 + 6 = 8x + 16 - 6

2) Combine totals

6x - 30 = 8x + 10

3) 6x - 8x = 40
-2x = 40, -x = 20, invert: -20 = x, (or) x = -20

👍 0 👎 0

[匿名]

2008-03-23 7:09 am

the first one...

6x-36+6=8x+12-6
6x-30=8x+6
6x=8x+36
-8x
-2x=36
x= -18

the second one...

5x+20=7x-14
20=2x-14
+14
34=2x
x=17

👍 0 👎 0

An ESL Learner

2008-03-23 5:20 pm

1)
6(x - 6) + 6 = 8(x + 2) - 6
6*x - 6*6 = 8*x + 8*2 - 6
6x - 36 + 6 = 8x + 16 - 6
6x - 30 = 8x + 10
6x - 8x = 30 + 10
-2x = 40
x = 40/-2
x = -20

2)
5(x + 4) = 7(x - 2)
5x + 20 = 7x - 14
5x - 7x = -20 - 14
-2x = -34
x = -34/-2
x = 34/2
x = 17

👍 0 👎 1

[匿名]

2008-03-23 7:06 am

first .... 6X -36 + 6 = 8X + 16 - 6

combine and move the 6 X and the + 10

which is -30 - 10 = 2x so X = -20.

This checks and is CORRECT. The rest above are wrong.

........ The second problem, you need to distribute both sides

5(x+4)=7(x-2)

gives you
5X + 20 = 7X - 14

add 14 - 5X to both sides.

34 = 2X, so X = 17. And it checks.

👍 0 👎 1

[匿名]

2008-03-23 7:05 am

answer to #1

6x-6=8x+10
-16=2x

-8=x

👍 0 👎 2

收錄日期: 2021-05-01 10:16:13
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080322230046AA41H8s

檢視 Wayback Machine 備份