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=> 0,75x = 18,25 - 0,5
=> 0,75x = 17,75
=> x = 17,75 : 0,75
=> x = 23,67
Maaf ya hanya bisa menjawab no.3 saja
6x + 9 = 5x - 5
x = -5 - 9
x = -14
no 5 tinggal dikali 5