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2.5/7-2/3=
=5/7-2/3=____/21
=15-14/21
=1/21
kalo gak salah
kekiri ==> negatif,
jadi 8-6 = 2
2) 5 2
___ - ___
7 3
15 - 14 ==> 15 = ( 21 / 7 x 5) kalau 14 = (15 = ( 21 / 3 x 2)
__________
21 ==> Disamakan penyebutnya
1
__
21