Mathematics
Senior High
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一次方式の単元 なんですけど、「両辺 に(数字)かける」とかどうすればいいんですか?

(2)4 =5 両辺に 4をかけて 42=5 5 x=20 4
両辺21かける (5) x-4=1/1 3 7(x-4)=3x 17x-28=3x 4x=28 x=7
3 (6) 1/2x-5=-1/x 2£-20=-3x 5%=20 x=4 R 両辺4かとる

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早めの回答ありがとね〜〜ヾ(。>﹏<。)ノ゙✧*。

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