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l.foto=40-8=32cm
p.karton=60cm
dit: p.foto?
luas karton untuk nama?
jawaban: (l.foto:l.karton)=(p.foto:p.karton)
=(32:40)=(60-4-x : 60)
=(4:5)=(56-x:60)
=4.60=5.(56-x)
=240=280-5x
5x=280-240
5x=40
x=8
maaf klu salah