Example

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

Question

$$x = 3 ^ { \frac { 1 } { 3 } } + 3 ^ { - \frac { 1 } { 3 } } , : 3 x ^ { 3 } - 9 x = 6$$

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