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Question Number 165355 by Ari last updated on 31/Jan/22

Answered by Ar Brandon last updated on 31/Jan/22

{ ((x+y−z=170)),((z+y−x=130)) :} ⇒2y=300⇒y=150

{x+y−z=170z+y−x=130⇒2y=300⇒y=150

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