Example

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

Question

$$(\frac{5}{9}-1\frac{1}{6}\cdot\frac{1}{2}):\frac{5}{9}+\frac{17}{60}$$

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