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12.3/4x - 12.1/3y =5.12
9x - 4y = 60
6.1/2x + 6.2/3y = -12
Lalu pakai eliminasi
9X - 4y = 60
3X + 4y = - 12
----------------------+
12x + 0 = 48
X = 48/12 = 4
Masukkan x.
3/4.4 - 1/3y =12
-1/3 y = 9
Y= -27
4-(-27x3)
4--81
4+81
=85