Please show working out :)
Solve for x
-3x+4=9
--------
2
7x+4=3x-8
simplify:
4
--
y/x-1
please show working out! :)
Algebra help! / finding x and simplifying?
2016-06-18 9:18 am
回答 (2)
2016-06-18 9:23 am
(-3x + 4)/2 = 9
(-3x + 4)/2 = 18/2
-3x + 4 = 18
-3x + 4 - 4 = 18 - 4
-3x = 14
-3x/(-3) = 14/(-3)
x = -14/3
====
7x + 4 = 3x - 8
7x + 4 - 3x - 4 = 3x - 8 - 3x - 4
4x = -12
4x/4 = -12/4
x = -3
====
4 / [y/(x - 1)]
= 4 × [(x - 1)/y]
= 4(x - 1)/y
(-3x + 4)/2 = 18/2
-3x + 4 = 18
-3x + 4 - 4 = 18 - 4
-3x = 14
-3x/(-3) = 14/(-3)
x = -14/3
====
7x + 4 = 3x - 8
7x + 4 - 3x - 4 = 3x - 8 - 3x - 4
4x = -12
4x/4 = -12/4
x = -3
====
4 / [y/(x - 1)]
= 4 × [(x - 1)/y]
= 4(x - 1)/y
2016-06-18 10:04 am
If there are three questions it is best to label them as 1 , 2 and 3
1
4 - 3x = 18
- 14 = 3x
x = - 14/3
2.
4x = - 12
x = - 3
3.
Will assume that what is actually meant is :-
4
--------------
y / (x - 1)
4 (x - 1)
------------
y
Whatever is meant , you MUST use brackets
1
4 - 3x = 18
- 14 = 3x
x = - 14/3
2.
4x = - 12
x = - 3
3.
Will assume that what is actually meant is :-
4
--------------
y / (x - 1)
4 (x - 1)
------------
y
Whatever is meant , you MUST use brackets
收錄日期: 2021-04-18 15:07:08
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160618011801AAxHNXW