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OpenStudy (anonymous):
Solve the system of equations 2x - y + 2z = 15 -x + y + z = 3 3x - y + 2z = 18
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OpenStudy (anonymous):
z=3+x-y Substitute 2x - y + 2(3+x-y) = 15 3x - y + 2(3+x-y) = 18 &Solve
OpenStudy (anonymous):
^This
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