Example

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

Question

$$( \frac{ 36 }{ 8 } + \frac{ 25 }{ 5 } )-( \frac{ 60 }{ 18 } + \frac{ 50 }{ 6 } )=$$

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