Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$x+\frac{\frac{5}{x}}=6; \begin{cases}y-\frac{3}{y}=\frac{1}{2}; -6x^{2}+40=$$

Evaluate

$\infty$

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