Example

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

Question

$$-2 \frac{ 1 }{ 9 } -(-4 \frac{ 2 }{ 11 } +1 \frac{ 8 }{ 9 } )$$

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