約到最簡~~中二!!

2007-12-18 6:22 am
請幫我約到最簡:

x/r + 1/s = ax

最後答案一定一定要系 x=??

啫系make x be the subject of the following question.

回答 (1)

2007-12-18 6:32 am
✔ 最佳答案
x/r + 1/s = ax
(sx + r) / rs = ax
sx + r = ax(rs)
r = axrs - sx
r = x(axr -s)
x = (axr -s) / r
OR x = ax - s/r


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