Question: (optional) Solve by the substitution method:2xy +32 = 8x+y+z=93x - 5y + 2z = -7(i) (optional) Solve by the substitution method:

(optional) Solve by the substitution method:

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(optional) Solve by the substitution method:2xy +32 = 8x+y+z=93x - 5y + 2z = -7(i)

(optional) Solve by the substitution method:

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