Penjelasan dengan langkah-langkah:
2x - y = 5 (×3)
3x + 2y = 4 (×2)
---------------------
-7y = 7
y = -1
2x - y = 5
2x - (-1) = 5
2x = 5 + (-1)
2x = 4
x = 2
= ½x - y
= ½·2 - (-1)
= 1 - (-1)
= 2 (A)
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Penjelasan dengan langkah-langkah:
2x - y = 5 (×3)
3x + 2y = 4 (×2)
---------------------
-7y = 7
y = -1
2x - y = 5
2x - (-1) = 5
2x = 5 + (-1)
2x = 4
x = 2
---------------------
= ½x - y
= ½·2 - (-1)
= 1 - (-1)
= 2 (A)