Question

qual e o calculo e resposta do sistema:
2x+y=7
x-6y=8

Answer 1

y=7-2x
x-6y=8
x-6.(7-2x)=8
x-42+12x=8
x+12x=8+42
13x=50
x=50/13

x-6y=8
50/13-6y=8
50/13-8=6y
-54/13/6=y
-54/78=y
y=9/13