find the
sum of
5x + 8y + 7z,
6y +4z-2x, and 3y + 4x +9z
Answers
Answered by
1
5x + 8y + 7z
-2x + 6y + 4z
4x + 3y + 9z
-‐----------------------
7x + 17y + 20z
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