f.1 math 一條

2008-05-27 3:41 am

1/2(y+4)=y+1/8(4-y)

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回答 (4)

2008-05-27 3:44 am

✔ 最佳答案

1/2(y+4)=y+1/8(4-y)
y/2+2=y+1/2-y/8
4y+16=8y+4-y
4y+16=7y+4
12=3y
y=4

參考: my maths knowledge

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2008-05-28 3:57 am

1/2(y+4)=y+1/8(4-y)
y/2+2 =y+y/2-y/8
2-y/2=y-y/8-4/8y
1.5=3/8y
3/2*8/3=y
4=y
y=4

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2008-05-27 4:05 am

y/2+2=y+1/2-y/8
y/2-y+y/8=1/2-2
-y/2+y/8=-3/2
-3y/8=-3/2
3y/4=3
3y=12
y=4

參考: me

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2008-05-27 3:47 am

1/2(y+4)=y+1/8(4-y)

0.5(y+4)=0.125(4-y)

0.5y+2=0.5-0.125y

0.5y+0.125y=0.5-2

0.625y=-1.5

y=-2.4

y=-12/5

參考: me

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