78 = x/9 80 = x/10
x = 78 . 9 x = 80 . 10
x = 702 x = 800
800 - 702
= 98
*maaf kalo salah
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78 = x/9 80 = x/10
x = 78 . 9 x = 80 . 10
x = 702 x = 800
800 - 702
= 98
*maaf kalo salah