Example

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

Question

$$(-)(-19)$$

Answer

19*

Solution


Simplify.
\[-19\times -\]
Simplify negative sign.
\[19\]
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