Jawabanmu

2014-08-24T12:18:43+07:00
1b. 12/20 = y/10
       y = 10 x 12 : 20 = 6

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Jawaban paling cerdas!
2014-08-24T12:36:54+07:00
A.angkanya kurang jelas
b.12/20 = y/10, 120 = 20y, y = 6
c.3/3+z=7/14, 42=21+7z, 7z=21, z =3

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