Example

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

Question

$$7 \frac{ 1 }{ 2 } +2 \frac{ 7 }{ 10 } -2 \frac{ 3 }{ 5 }$$

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