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

2*x

Solution


Remove parentheses.
\[x-y+x+y\]
Collect like terms.
\[(x+x)+(-y+y)\]
Simplify.
\[2x\]
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