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= 3/7 × 11/4 - 19/28
= 33/28 - 19/28
= 14/28 = 1/2 (B)
----- x 2 ---- - ----- ===> ----- x ----- - ------
7 4 28 7 4 28
33 19
= ------ - ------
28 28
14 1
= ------ = ---- ( B )
28 2
semoga jelas dan membantu ya