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10x + 2y = 3 (kali 1)
__________
10x - 8y = 2
10x + 2y = 3
__________- eliminasi x
-10y = -1
y = 1/10
sub nilai y ke pers 1
5x - 4(1/10) = 1
5x - 4/10 = 1
5x = 1 + 4/10
5x = 14/10
x = (14/10) : 5
x = 14/50 atau x = 7/25