A Maths question

2006-11-15 3:00 am

There is a Maths question...Can you help me to solve the question?

1) 2.5y+2=3y-2

y=?

please 列出步驟...THX.....^^

回答 (4)

2006-11-15 3:03 am

✔ 最佳答案

2.5y+2=3y-2
2.5y-3y=-2-2
-0.5y=-4
y=4 x 2
y=8
希望幫到你啦^o^

2006-11-14 19:03:56 補充：
尾2個2條式唔記得按spacebar~~sorry-0-

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2006-11-15 4:08 am

2.5y+2=3y-2
2.5y+2+2=3y-2+2
2.5y+4=3y
2.5y+4-2.5y=3y-2.5y
4=0.5y
4x2=0.5yx2
8=y
y=8

參考: me

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2006-11-15 3:05 am

2.5y+2=3y-2
2.5y-3y=-4
-0.5y=-4
y=8

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2006-11-15 3:04 am

2.5y-3y= -2-2
y(2.5-3)= -4
y=-4/-0.5
y=8

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