Mathematics, 31.01.2020 21:52 brenton14

If 9x+2y^2−3z^2=132 and 9y−2y^2+3z^2=867, then x-y =

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If 9x+2y^2−3z^2=132 and 9y−2y^2+3z^2=867, then x-y =...