Example

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

Question

$$(p-q)-(p+q)$$

Answer

-2*q

Solution


Remove parentheses.
\[p-q-p-q\]
Collect like terms.
\[(p-p)+(-q-q)\]
Simplify.
\[-2q\]
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