方程式 5(y+4)-6(8+3y)=-2 答案

2013-10-01 10:11 pm

5(y+4)-6(8+3y)=-2

回答 (5)

2013-10-04 3:13 am

_____5(y+4)-6(8+3y)=-2
______5y+20-48-18y=-2
_____________-13y=26
________________y=-2

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參考: me

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2013-10-02 1:51 pm

= 5(y+4)-6(8+3y)
= 5y+20-48-18y
= 5y-18y+20-48
= -13y-28
= -13y=-2+28
= -13y=26
y=26除-13
y=-2

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2013-10-02 2:47 am

5(y+4)-6(8+3y)=-2
5y+20-48-18y=-2
-13y=26
y=-2

參考: 自己...

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2013-10-01 10:54 pm

樓上的答案在最後步驟似乎錯了正負號，會不會是 y = 負 2 呢?

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2013-10-01 10:29 pm

5(y+4)-6(8+3y)=-2
5y+20-48-18y=-2
5y-18y+20-48=-2
-13y-28=-2
-13y=-2+28
-13y=26
y=26除13
y=2

:)

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