Example

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

Question

$$\frac{ 1 }{ \frac{ 1 }{ 4 } }$$

Answer

4

Solution


Invert and multiply.
\[4\]
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