Example

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

Question

$$1(-1\frac{3}{25})-2\frac{1}{7}+(-2\frac{1}{9})\cdot(-\frac{27}{790})$$

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