Example

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

Question

$$-7 \sqrt{ 9 } -7 \sqrt{ 9 } -7 \sqrt{ 9 } -7 \sqrt{ 9 } -7 \sqrt{ 9 } +21 \sqrt{ 9 }$$

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