Respuesta :

JahanR
Substitute y from the first equation into the second:

2x+(x+4)=13
3x+4=13
3x=9
x=3.
Okay, for this one is will use substitution:
y=x+4
y-x=4
2y-2x=8

-2x+2y=8
+
2x+y=13
=
3y=21
y=7
x=3 is your final answer. Hope it help!

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