Backtrack (5-3x)/4-3=2?

👨🏻‍🏫 學術台 數學
2008-12-01 8:12 am
Hi,
can someone please backtrack this for me to find x?

(5-3x)/4-3=2

Thanks
David
更新1:

Thanks everyone, the correct answer is -5 according to the book.

回答 (10)

2008-12-01 8:55 am
✔ 最佳答案
(5 - 3x)/4 - 3 = 2
(5 - 3x)/4 = 2 + 3
5 - 3x = 4(5)
- 3x = 20 - 5
x = 15/- 3
x = - 5

Answer: x = - 5

Proof:
(5 - 3[- 5])/4 - 3 = 2
(5 + 15)/4 - 3 = 2
20/4 - 3 = 2
5 - 3 = 2
2 = 2
👍 1 👎 0
2008-12-01 8:16 am
ADD 3 to each side
(5-3x)/4=5

MULTIPLY 4 to each side
5-3x=20

SUBTRACT 5 from each side
-3x=15

DIVIDE -3 from each side
x=-5
👍 1 👎 1
2016-05-27 11:48 am
The Manfreds. The song was even called 5-4-3-2-1, which I think was very nice of them.
👍 0 👎 0
2008-12-01 9:15 am
First you need to
ADD 3 TO EACH SIDE

(5-3x)/4=2+3
(5-3x)/4=5

Then MULTIPLY EACH SIDE BY 4
5-3x=5*4
5-3x=20

ADD 3x TO EACH SIDE

5=3x+20

SUBTRACT 20 FROM EACH SIDE

5-20=3x
-15=3x

now to FIND X

x= -15/3
x=-5
👍 0 👎 0
2008-12-01 8:29 am
(5 - 3x) / 4 = 5
5 - 3x = 20
3x = - 15
x = - 5
👍 0 👎 0
2008-12-01 8:17 am
(5 - 3x)/4 - 3 = 2
(5 - 3x)/4 = 2 + 3
5 - 3x = 4(5)
5 - 3x = 20
-3x = 20 - 5
-3x = 15
x = 15/-3
x = -5
👍 0 👎 0
2008-12-01 8:16 am
(5-3x)/4-3=2?

(5-3x)/4=2+3
(5-3x)/4=5
(5-3x)=20

-3x= 20-5

-3x=15
x=15/-3
x=-5
👍 0 👎 0
2008-12-01 8:16 am
5-3x=2
-3x=-3
x=1
👍 0 👎 0
2008-12-01 8:16 am
5-3x=2

-3x=2-5

x=-3/-3=1
👍 0 👎 0
2008-12-01 8:14 am
x=1
👍 0 👎 0


收錄日期: 2021-05-01 11:34:05
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