Example

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

Question

$$3( \frac{ 8 }{ 27 } )+( \frac{ 4 }{ 9 } )-20( \frac{ 2 }{ 3 } )+12$$

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