一、已知a+b-c=0,2a-b+2c=0,(c≠0),求(3a-2b+5c)÷(5a-3b+2c)的值二.已知(3x-22)÷【(x+2)(x-5)】=a÷(x+2)-b÷(x-5),求a+b的值
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![一、已知a+b-c=0,2a-b+2c=0,(c≠0),求(3a-2b+5c)÷(5a-3b+2c)的值二.已知(3x-22)÷【(x+2)(x-5)】=a÷(x+2)-b÷(x-5),求a+b的值](/uploads/image/z/5501268-36-8.jpg?t=%E4%B8%80%E3%80%81%E5%B7%B2%E7%9F%A5a%2Bb-c%3D0%2C2a-b%2B2c%3D0%2C%28c%E2%89%A00%29%2C%E6%B1%82%283a-2b%2B5c%29%C3%B7%285a-3b%2B2c%29%E7%9A%84%E5%80%BC%E4%BA%8C.%E5%B7%B2%E7%9F%A5%EF%BC%883x-22%29%C3%B7%E3%80%90%28x%2B2%29%28x-5%29%E3%80%91%3Da%C3%B7%28x%2B2%29-b%C3%B7%EF%BC%88x-5%29%2C%E6%B1%82a%2Bb%E7%9A%84%E5%80%BC)
一、已知a+b-c=0,2a-b+2c=0,(c≠0),求(3a-2b+5c)÷(5a-3b+2c)的值二.已知(3x-22)÷【(x+2)(x-5)】=a÷(x+2)-b÷(x-5),求a+b的值
一、已知a+b-c=0,2a-b+2c=0,(c≠0),求(3a-2b+5c)÷(5a-3b+2c)的值
二.已知(3x-22)÷【(x+2)(x-5)】=a÷(x+2)-b÷(x-5),求a+b的值
一、已知a+b-c=0,2a-b+2c=0,(c≠0),求(3a-2b+5c)÷(5a-3b+2c)的值二.已知(3x-22)÷【(x+2)(x-5)】=a÷(x+2)-b÷(x-5),求a+b的值
一、a+b-c=0,2a-b+2c=0,两式子相加得c=-3a;将c=-3a带入第一式可得b=-4a
将c=-3a;b=-4a带入式子化简得-4/11