Example

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

Question

$$( \frac{ 8 }{ -5 } - \frac{ 7 }{ 10 } ) \times (- \frac{ 3 }{ 25 } + \frac{ 1 }{ 4 } )$$

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