How is (5/x)+(3/2x)=(6/(x+2) solved ?
回答 (3)
2016-02-26 7:58 pm
(5/x) + (3/2x) = 6/(x + 2)
(10/2x) + (3/2x) = 6/(x + 2)
(13/2x) = 6/(x + 2)
13(x + 2) = 12x
13x + 26 = 12x
x = -26
(10/2x) + (3/2x) = 6/(x + 2)
(13/2x) = 6/(x + 2)
13(x + 2) = 12x
13x + 26 = 12x
x = -26
2016-02-26 7:56 pm
If that is:
5 / x + 3 / (2x) = 6 / (x + 2)
Then the first thing to notice is that x cannot be -2 or 0, otherwise you'll be dividing by zero.
Next, the LCD of this is 2x(x + 2). Multiply both sides by this to get rid of the fractions:
10(x + 2) + 3(x + 2) = 12x
simplify and solve:
10x + 20 + 3x + 6 = 12x
13x + 26 = 12x
x = -26
5 / x + 3 / (2x) = 6 / (x + 2)
Then the first thing to notice is that x cannot be -2 or 0, otherwise you'll be dividing by zero.
Next, the LCD of this is 2x(x + 2). Multiply both sides by this to get rid of the fractions:
10(x + 2) + 3(x + 2) = 12x
simplify and solve:
10x + 20 + 3x + 6 = 12x
13x + 26 = 12x
x = -26
2016-02-26 8:09 pm
Multiply by(2x)(x+2)
10(x+2)+3(x+2)=6(2x)
10x+20+3x+6=12x
13x+26=12x
x=-26
-10/52-3/52=-13/52=-1/4
6/(x+2)=6/(-26+2)=6/-24=-1/4
10(x+2)+3(x+2)=6(2x)
10x+20+3x+6=12x
13x+26=12x
x=-26
-10/52-3/52=-13/52=-1/4
6/(x+2)=6/(-26+2)=6/-24=-1/4
收錄日期: 2021-04-18 14:30:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160226115210AAQCNgw