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Pls help I don't know the answer

Pls help I don't know the answer-example-1

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Answer: w=-7/4, x = 3 , z = 8.
You were only incorrect on one which I will provide an image on how I solved that one so you can maybe see what you did wrong. hope it helps !

Pls help I don't know the answer-example-1
User MBo
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