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✨ Jawaban Terbaik ✨

(1)(y-18)人拿3個
3×(y-18)+18×2=2x

(2) 7y+22=6x

由(1)*3
9y-54=6x=7y+22
2y=76
y=38
6x=266+22=288
x=48

訪客

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