Example

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

Question

$$\begin{cases}3^{7}-2^{x^{3}}=77\\ 3^{\frac{s}{2}}-2^{\frac{x^{2}}{2}}=7\end{cases}$$

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