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225 : 300
jawab: D
6) bedu + benu = 300
bedu = 175
benu = 125
bedu : benu
175 : 125
7 : 5
jawab : C
7) ayah = b
anak = a
b + a = 80
b = 3a
3a + a = 80
a = 20
jawab : C