solve for x:5x-11=21+4(1-x)?
回答 (9)
2008-10-09 3:54 pm
✔ 最佳答案
5x - 11 = 21 + 4 (1 - x)5x - 11 = 21 + 4 - 4x
9x = 36
x = 4
2008-10-09 10:17 pm
5x - 11 = 21 + 4(1 - x)
5x - 32 = 4 - 4x
9x = 36
x = 4
Answer: x = 4
Proof:
5(4) - 11 = 21 + 4(1 - 4)
20 - 11 = 21 + 4(- 3)
9 = 21 - 12
9 = 9
5x - 32 = 4 - 4x
9x = 36
x = 4
Answer: x = 4
Proof:
5(4) - 11 = 21 + 4(1 - 4)
20 - 11 = 21 + 4(- 3)
9 = 21 - 12
9 = 9
2008-10-10 2:01 am
5x - 11 = 21 + 4 - 4x
9x = 36
x = 4
9x = 36
x = 4
2008-10-09 10:43 pm
5x-11=21+4(1-x)
5x-11=21+4-4x
5x-11=25-4x
+11 +11
5x=36-4x
+4x +4x
9x=36
x=4
5x-11=21+4-4x
5x-11=25-4x
+11 +11
5x=36-4x
+4x +4x
9x=36
x=4
2008-10-09 10:25 pm
5x - 11 = 21 + 4(1 - x)
5x - 11 = 21 + 4*1 - 4*x
5x - 11 = 21 + 4 - 4x
5x + 4x = 25 + 11
9x = 36
x = 36/9
x = 4
5x - 11 = 21 + 4*1 - 4*x
5x - 11 = 21 + 4 - 4x
5x + 4x = 25 + 11
9x = 36
x = 36/9
x = 4
2008-10-09 10:06 pm
Q. 5x-11=21+4(1-x)
= 5x - 11 = 21 + 4 - 4x
= 5x + 4x = 21 + 4 + 11
= 9x = 36
= x = 36/9
= x = 4
= 5x - 11 = 21 + 4 - 4x
= 5x + 4x = 21 + 4 + 11
= 9x = 36
= x = 36/9
= x = 4
2008-10-09 10:01 pm
5x-11=21+4-4x,9x=36
x=4
x=4
2008-10-09 10:01 pm
5x - 11 = 21 + 4(1 - x)
multiply the 4 with (1-x)
5x - 11 = 21 + 4 - 4x
add 4x to both sides. Add 11 to both sides
5x + 4x = 21 + 4 + 11
Combine
9x = 36
divide both sides by 9
x = 4
place 4 back into orig equation to check
5x - 11 = 21 + 4(1 - x)
5*4 - 11 = 21 + 4(1 - 4)
20 - 11 = 21 + 4(-3)
9 = 21 - 12
9 = 9
got it right!
multiply the 4 with (1-x)
5x - 11 = 21 + 4 - 4x
add 4x to both sides. Add 11 to both sides
5x + 4x = 21 + 4 + 11
Combine
9x = 36
divide both sides by 9
x = 4
place 4 back into orig equation to check
5x - 11 = 21 + 4(1 - x)
5*4 - 11 = 21 + 4(1 - 4)
20 - 11 = 21 + 4(-3)
9 = 21 - 12
9 = 9
got it right!
2008-10-09 9:59 pm
5x-11=25-4x
9x=36
x=4
9x=36
x=4
收錄日期: 2021-05-01 11:20:38
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20081009065311AAPdNjU