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find the values of x,y and zfrom the fol...

find the values of x,y and zfrom the following equations :
`(i) [{:(4,3),(x,5):}]=[{:(y,z),(1,5):}]`
`(ii) [{:(x+y,2),(5+z,xy):}]=[{:(6,2),(5,8):}]`
`(iii) [{:(x+y+z),(x+z),(y+z):}]=[{:(9),(5),(7):}]`

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