-1
4
1
5
Correct answer is C
x ∗ y = xy - y - x, x ∗ 3 = 3x - 3 - x = 2x - 3 2 ∗ x = 2x - x - 2 = x - 2 ∴ 2x - 3 = x - 2 x = -2 + 3 = 1
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