Jawabanmu

2014-08-13T14:15:31+07:00
A.  \frac{21}{6} :  \frac{x}{8} =  \frac{168}{6} = 28
     t = 28, l = 21. luas = 28x21 = 588
b.  \frac{sebelum}{setelah} :  \frac{48}{588} =  \frac{1}{21}
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