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u9 = 8a+b = 37
u4 = 3a+b = 17
sehingga 5a=20, a=4
3a+b=17
3(4) + b = 17
12+b=17
b=5
u41=40a+b = 40 (4) + 5 = 160 + 5 = 165
U9= 37
U4 ke U9 ada 5b
U4 ke U9 selisih 20
b=20/5= 4
U41 dekat dengan U9
jadi U9 + b(U41-U9)
=37 + 4(32)
=165
smoga bisa membantu