Example

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

Question

$$x = - \frac { 11 } { 4 } \div \frac { \sqrt { 121 - 112 } } { 4 } , 0$$

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