Example

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

Question

$$1\frac{1}{2}\div[\frac{7}{6}+\{\frac{245}{2}-(\frac{4}{3}+121\div\frac{11}{8})\}]$$

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