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國一 連比例問題
Apr 24th 2014, 15:11

請問

(1)若(x +1):(y +2):(z+4)=4:5:6

且2x +3y +z =104,則x +y -z =?

(2)若 x :y :z = (x +3):(y -5):(z +6),

且3x +5y +6z =40,求x =?

不懂從哪裡算起,請數學達人講解概念,感謝。

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