已知x+2y+3z=54,3x+2y+2z=47,2x+y+z=31,那么代数式x+y+z的值是( ).
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![已知x+2y+3z=54,3x+2y+2z=47,2x+y+z=31,那么代数式x+y+z的值是( ).](/uploads/image/z/469148-68-8.jpg?t=%E5%B7%B2%E7%9F%A5x%2B2y%2B3z%3D54%2C3x%2B2y%2B2z%3D47%2C2x%2By%2Bz%3D31%2C%E9%82%A3%E4%B9%88%E4%BB%A3%E6%95%B0%E5%BC%8Fx%2By%2Bz%E7%9A%84%E5%80%BC%E6%98%AF%EF%BC%88+%EF%BC%89.)
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已知x+2y+3z=54,3x+2y+2z=47,2x+y+z=31,那么代数式x+y+z的值是( ).
已知x+2y+3z=54,3x+2y+2z=47,2x+y+z=31,那么代数式x+y+z的值是( ).
已知x+2y+3z=54,3x+2y+2z=47,2x+y+z=31,那么代数式x+y+z的值是( ).
我上载图花了15分钟还不可以,只好把答案作为附件放上.答案为55 ,方法在档案中