# 1
Manakah di antara persamaan berikut yang merupakan sistem persamaan linear dua variabel?
x + 2y = 5 dan y = 3x - 1
x^2 + y = 7 dan 2x - y = 4
x + y + z = 10 dan 2x - y = 3
x + 3 = 8 dan y - 5 = 2




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