Form 1 Maths-------10 marks

2007-12-22 2:31 am

Solve the following equations for x(Please show your steps clearly,do not only give me the answer)

6(d-bx)=12x

回答 (3)

2007-12-22 2:36 am

✔ 最佳答案

d-bx=2x
2x+bx=d
x(2+b)=d
x=d/(2+b)

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2007-12-22 7:34 am

6(d-bx)=12x
6d-6bx=12x
-6bx-12x=-6d
6bx+12x=6d 抽負號出來,左右兩邊約去負號
6x(b+2)=6d 抽公因數6x
6x(b+2)=6d
x=6d/6(b+2) cancel6
x=d/(b+2)

參考: 自己計

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2007-12-22 2:39 am

6(d-bx)=12x
6d-6bx=12x
12x+6bx=6d
6x(2+b)=6d
x(2+b)=d

x=d/(2+b)

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