Question

Add the following:
2 xy + 3z - 9 and -18 yx + 7z -4

Do it step wise please ​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

$2xy + 3z - 9 + ( - 18yx) + 7z - 4$

yx can be written as xy

$2xy + 3z - 9 - 18xy + 7z - 4$

$- 16xy + 10z - 13$

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