教下我等住救命

2008-10-26 7:23 am

我有一題數學唔識,

唔該你地教教我,

係轉主項,寫埋步驟,

a(x+b)=b(x-a),則x=

千萬個唔該......

回答 (4)

2008-10-26 7:33 am

✔ 最佳答案

a(x + b) = b(x - a)

ax + ab = bx - ab

ax - bx = -2ab

bx - ax = 2ab

(b - a)x = 2ab

x =2ab/(b - a)
=

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2008-10-26 11:12 pm

a(x+b)=b(x-a)
ax+ab=-bx-ab
ab+ab=ax+bx
2ab=ab2x
2ab-ab=2x
ab =2x
ab/2=x
x=ab/2

參考: me

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2008-10-26 5:53 pm

a(x + b) = b(x - a)
ax + ab = bx - ab
ax - bx = -2ab
bx - ax = 2ab
(b - a)x = 2ab
x =2ab/(b - a)

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2008-10-26 7:37 am

a(x b) = b(x-a)
ax ab = bx-ab
ax-bx = -ab-ab
x(a-b) = -2ab
x = -2ab/(a-b)

參考: 自己

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