Respuesta :

bharat18878

Answer:

[1]XXXX9x−9y=27

[2]XXXX7y−3x=−11

Resequence the terms of [2] so the variables occur in the same order as in [1]

[3]XXXX−3x+7y=−11

Multiply [3] by 3

[4]XXXX−9x+21y=−33

Add [1] and [4]

[5]XXXX12y=−6

Divide [5] by12

[6]XXXXy=−12

Substitute y=−12 into [1]

[7]XXXX9x−9(−12)=27

Simplifying

[8]XXXX9x=452

[9]XXXXx=52

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