已知a的2/3是5/9,b的2/5是3/7,求:(1)a与b的值(2)a+b的值
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![已知a的2/3是5/9,b的2/5是3/7,求:(1)a与b的值(2)a+b的值](/uploads/image/z/1607215-31-5.jpg?t=%E5%B7%B2%E7%9F%A5a%E7%9A%842%2F3%E6%98%AF5%2F9%2Cb%E7%9A%842%2F5%E6%98%AF3%2F7%2C%E6%B1%82%EF%BC%9A%EF%BC%881%EF%BC%89a%E4%B8%8Eb%E7%9A%84%E5%80%BC%EF%BC%882%EF%BC%89a%2Bb%E7%9A%84%E5%80%BC)
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