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4x - 7y = -2 I x2 I => 8x - 14y = -4 (dikurang)
26y = 52
y = 52 / 26
y = 2
Subtitusikan nilai y = 2 ke salah satu persamaan:
2x + 3y = 12
2x + 3 (2) = 12
2x + 6 =12
2x = 12 - 6
2x = 6
x = 6 / 2
x = 3