Gjej v, y (complex solution)
y=\frac{-\sqrt{7}i+9}{2}\approx 4.5-1.322875656i\text{, }v=\frac{1+\sqrt{7}i}{2}\approx 0.5+1.322875656i
y=\frac{9+\sqrt{7}i}{2}\approx 4.5+1.322875656i\text{, }v=\frac{-\sqrt{7}i+1}{2}\approx 0.5-1.322875656i
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