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12½=¼+x+35/10
12½=¼+x+7/5
12½=5/20+x+28/20
12½=33/20+x
25/2=33/20+x
25/2-33/20=x
250/20-33/20=x
217/20=x
= 12,50 kg - 0,25 kg - 3,50 kg
= 8,75 kg
= 8 3/4 kg
Jadi, yang terjual = 8 3/4 kg
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