Question
Add the following: $\ \ \ \ \ \text{x}-3\text{y}-2\text{z}\\ \ \ \ \ 5\text{x}+7\text{y}-\text{z}\\ \underline{-7\text{x}-2\text{y}+4\text{z}\ \ }\\\underline{\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ }$
✓
Answer
$\ \ \ \ \ \text{x}\ -3\text{y}-2\text{z}\\ \ \ \ \ 5\text{x}+7\text{y}-\text{z}\\ \underline{-7\text{x}-2\text{y}+4\text{z}\ \ }\\\underline{-\text{x}\ \ +2\text{y}+\ \text{z}\ \ \ }$
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