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4x - 3y = 12 .... (1)
1/2 x + 1/4 y = 4 ....> kalikan dengan 8
4x + 2y = 32 ....(2)
persamaan 1 dan persamaan 2 di eliminasikan
4x - 3y = 12
4x + 2y = 32
kurangkan
- 5y = - 20
y = -20 : -5
y = 4
4x - 3y = 12
4x - 3(4) = 12
4x = 12 + 12 = 24
x = 24 : 4 = 6
x = 6,
y = 4