Example

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

Question

$$1\frac{1}{5}-[(\frac{2}{3}\times\frac{1}{3}+\frac{1}{5})\times\frac{4}{9}]$$

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