Example

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

Question

$$1 \times 2 \times 3 \times 4 \times 5 \times 6 \times 7 \times 8 \times 9$$

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