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1) n=8
2) 35 / 4
cara :
1)
3/4 =6/n
3n = 24
n = 8
2)
20 1/2 - 11 3/4 =
41/2 - 47/4=
35/4
dengan teknik kali silang maka
3n = 24
n = 8
2. 20 1per2 - 11 3per4 =
41per2 - 47per4 = 82per4-47per4 = 35 per 4 = 8 3per4