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ada 2 cara:
dalam kurungnya disederhanakan,
3 + 2 ( -20)
2 kalikan dgn -20
= 3 - 40
= - 37
atau
sifat distributif
3 + 2(3-23)
= 3 + (2 x 3) - (23 x 2)
= 3 + 6 - 46
= 9 - 46
= -37