Respuesta :

[A1]*3----- [A1]` ------ 6x-21y = 39
then [A1]`+[A2] ------ x-12y = 32 ----- [B2]

[B2]*2---- [B2]` ------ 2x-24y = 64
[B1]-[B2]` -------------- 17y= -51 ------- [C1]
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