Example

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

Question

$$\frac { 68 } { 21 } = x + \frac { 1 } { y + \frac { 1 } { z } } x , y , z x , y , z$$

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