Mathematics
Senior High
9の(2)
答えは−6x+2y+9zです。
途中式、解き方を教えてください!
9 次の式を計算せよ。
1) {47一(3の}一{⑰7一3)一(一57寺7)}
保 12ァー[4ッー3 {一3ァ一(3z一2ッー5る)一2z}
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