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Also another quick one, I was wondering how to format an answer for this : For two variables: at the moment i have { (x1,x2) in R2 ; x1= 4-2*x2 , x2 = (4-x1)/2 edit: i suppose this could also be written as {( M , (4-M)/2) in R2 ; M in R } ??

Thankyou :drink:, I assume in three variables it would follow the same way e.g {(x1,x2,x3) in R3: x1 = 5/2 }

Can someone please help explain what this question is asking? I missed some info and have no idea how to go about solving this, thanks