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OpenStudy (anonymous):
solve for z: x = 2.5y x +y +z =66 x −2y −2z =−12
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OpenStudy (misty1212):
HI!!!
OpenStudy (misty1212):
this is boring donkey work let the computer do it! http://www.wolframalpha.com/input/?i=x+%3D+2.5y%2C+x+%2By+%2Bz+%3D66%2C+x+%E2%88%922y+%E2%88%922z+%3D%E2%88%9212
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