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3X + 4Y = 5
Agar dapat dieliminasi harus ada yang habis (x atau y ) kita kalikan
pers.1 x 3
pers.2 x 5
15x + 18y = 21
15x + 20y = 25 _
-2y = -4
y = 2
mencari x
3x + 4y = 5
3x + 4.2 = 5
3x + 8 = 5
3x = -3
x = -1