Example

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

Question

$$( \frac{ -2 }{ 5 } \times \frac{ -7 }{ 10 } \times \frac{ 5 }{ 7 } )$$

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