已知4x-3y-6z=0,x+2y-7z=0(xyz>0),求(2x+3y+6z)÷(x+5y+7

已知4x-3y-6z=0,x+2y-7z=0(xyz>0),求(2x+3y+6z)÷(x+5y+7z)的值
2025-05-09 14:46:12
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回答1: