y=4
x=3
x+6y=27 = x = 27 -6y
7x-3y=9 = x = ( 9+3y )/7
27 -6y = ( 9+3y )/7
189 - 42y = 9+3y
-45y = 9-189
y = -180/-45
y = 4
X+6(4)=27
X+24=27
27-24=3
X=3
3+6(4)=27
3+24=27
27=27
7(3)-3(4)=9
21-12=9
9=9
Espero que mi respuesta te haya servido
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Verified answer
y=4
x=3
x+6y=27 = x = 27 -6y
7x-3y=9 = x = ( 9+3y )/7
27 -6y = ( 9+3y )/7
189 - 42y = 9+3y
-45y = 9-189
y = -180/-45
y = 4
X+6(4)=27
X+24=27
27-24=3
X=3
3+6(4)=27
3+24=27
27=27
7(3)-3(4)=9
21-12=9
9=9
Espero que mi respuesta te haya servido