Mathematics
Senior High
この問題のやり方を教えて欲しいです。
16直線の方程式, 2直線の関係 (1)
A問題
139 次の方程式の表す直線を座標平面上にかけ。
(2) 2.x+1=0
(1) x-2y+4=0
(3) y-3=0
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