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bilangan pertama = 2x bilangan kedua
7*2=14
jika dijumlahkan = 21
14+7=21
jika salah tolong koreksi saya :)
x= 2y
2y + y = 21
3y=21
y= 7
x= 2 . 7 = 14
x= bil. pertama
y= bil. kedua