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-1 (28/42 - 30/42)
-1 2/42 + 1 5/7
-1 2/42 + 1 30/42
28/42
= 16/21
Semoga membantu~~~
= 70/42 - 114/42 + 72/42
= - 44/42 + 72/42
= 28/42
28/42 = 4/6 = 2/3 ( Hasil penyederhanaan )