Example

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

Question

$$\frac { 2 ( 5 + 3 ) - 9 \div 3 + 5 } { 3 \times 5 + 2 \times 4 }$$

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