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23y = 920
y = 40
(6.40) + (17.40) = 920
240 + 680 = 920
selisih: 680 - 240 = 440
jumlah kedua bilangan 920
dimisalkan dengan x,
6x + 17x = 920
23x = 920
x = 40
selisihnya = 17x - 6x = (17 x 40) - (6 x 40) = 680 - 240 = 440