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4x + 2y = 5 x3 12x + 6y = 15
5x + 3y = 7 x2 10x + 6y = 14 (dikurangi)
2x = 1
x =1/2
substitusi untuk mengetahui y
4x + 2y = 5
(4 x 1/2) + 2y = 5
2 + 2y = 5
2y = 5-2
2y = 3
y = 3/2
b. eliminasi untuk mengetahui x
3x + 2y = 5 x5 15x + 10y = 25
7x + 5y = 4 x2 14x + 10y = 8 (dikurangi)
x = 17
substitusi untuk menetahui y
3x + 2y = 5
(3 x 17) + 2y = 5
51 + 2y = 5
2y = 5-51
2y = -46
y = -23