1.已知10分之(a+b)=11分之(b+c)=15分之(c+a),求a比b比c2.已知4分之x=3分之y=5分之z,求(x+2y+3z)分之(2x-y+z)的值,若x+2y-z=10,求x-2y+3z的值
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![1.已知10分之(a+b)=11分之(b+c)=15分之(c+a),求a比b比c2.已知4分之x=3分之y=5分之z,求(x+2y+3z)分之(2x-y+z)的值,若x+2y-z=10,求x-2y+3z的值](/uploads/image/z/1552770-18-0.jpg?t=1.%E5%B7%B2%E7%9F%A510%E5%88%86%E4%B9%8B%EF%BC%88a%2Bb%29%3D11%E5%88%86%E4%B9%8B%EF%BC%88b%2Bc%29%3D15%E5%88%86%E4%B9%8B%EF%BC%88c%2Ba%29%2C%E6%B1%82a%E6%AF%94b%E6%AF%94c2.%E5%B7%B2%E7%9F%A54%E5%88%86%E4%B9%8Bx%3D3%E5%88%86%E4%B9%8By%3D5%E5%88%86%E4%B9%8Bz%2C%E6%B1%82%EF%BC%88x%2B2y%2B3z%29%E5%88%86%E4%B9%8B%EF%BC%882x-y%2Bz%29%E7%9A%84%E5%80%BC%2C%E8%8B%A5x%2B2y-z%3D10%2C%E6%B1%82x-2y%2B3z%E7%9A%84%E5%80%BC)
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