Example

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

Question

$$-5 \frac{ 4 }{ 7 } +(- \frac{ 5 }{ 14 } +z)=3 \frac{ 1 }{ 7 }$$

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