Mathematics
Senior High
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(2)のy=3になる理由が分かりません
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(2)x+2y (2x-y) は実数であるから AST x+2y=4 かつ (2x-y)=7 これを解いて x=-2, y=3 エ 46m (1) 3(x-2) +4 vは実数であるから

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