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11. 解一元一次方程式3"xx-7×37=18×3°,得x之值為何? (A) (B) (C) 3 (D) 9

Answers

✨ Jawaban Terbaik ✨

(3⁵)²*x - 7*(3⁵)*3² = 18*(3⁵)
除以3⁵
(3⁵)x - 63 = 18
(3⁵)x = 81 = 3⁴
x = 1/3

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