Example

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

Question

$$x-y-(x-y)$$

Answer

0

Solution


Remove parentheses.
\[x-y-x+y\]
Collect like terms.
\[(x-x)+(-y+y)\]
Simplify.
\[0\]
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