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banyak permen A
= 5/2 x 30 = 75
banyak permen B
= 7/2 x 30 = 105
105+75 = 180 adalah jumlah permen mereka
selisih permen = 30
permen A = 5/2 X 30 = 75
permen B = 7/2 X 30 = 105
A+B = 75 + 105 = 180.
semoga membantu , maaf kalau salah.