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3 3/4 =15/4
4 1/2 =9/2
jadi 7/3 - 15/4 +9/2 =
(smakan penyebutnya ) menjadi /12
jadi
28/12 -45/12 +54/12 =
=37/12
ini jawabannnya menurut sya
smoga mmbantu y