Respuesta :

Answer:

{9, 76 }

Step-by-step explanation:

y=3x+49

y=7x+13

y-3x=49

y-7x=13

multiply the first one by 7 and the second one by -3 to eliminate x

7y -21x=343

-3y+21x= -39

4y = 304

y=76

76- 3x =49

-3x= -27

x=9

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