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Verified answer
Mencari nilai x dengan metode perbandingan(x + 9) / (5 + 7) = 9 / 7
(x + 9) / 12 = 9 / 7
7 (x + 9) = 9 x 12
7x + 63 = 108
7x = 108 - 63
7x = 45
x = 45 / 7
x = 6,4
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