Quick algebra question.... solve for x?
Question 1.
Solve the equation. The letters a, b, and c are constants.
a/x + b/x = c , c is not zero
Gracias!
回答 (5)
✔ 最佳答案
a=10 b=20 c=15 x=2
a/x=5
b/x=10
5+10=15
參考: My mind/brain
a/x + b/x = c
(a + b)/x = c
a + b = cx
x = (a + b)/c
Since a and b have the same denominators( x) you can combine them
a/x+b/x = c
a+b/x = c
then multiply x to both sides to cancel out
a+b/x . x = c.x
after canceling out the x on left side u have
a+b =c.x
now you divide by c to both side to cancel out c on the right side and solve for x
a+b/c = c.x/ c
therefore a+b/ c = x
a/x + b/x = c
x is the common denominator, so re-write as:
(a+b)/x = c, now just cross multiply to get:
x = (a+b)/c
a/x + b/x = c
(a + b)/x = c
x(a + b)/x = xc
a + b = xc
(a + b)/c = x
收錄日期: 2021-05-01 12:28:58
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090608192907AAkT5rX
檢視 Wayback Machine 備份