Example

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

Question

$$\frac{ 4 }{ { x }^{ 2 } -9 } - \frac{ x+1 }{ x-3 } =1$$

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