igual 0 la primera
x + 6y = 27=27-27=0
Respuesta:
9
Explicación paso a paso:
x + 6y = 27
7x - 3y = 9
-7x - 42y = -189
-45y = - 180
y = -180 /-45
y = 4
reemplazas en "y"
-7x - 42(4) = -189
-7x - 168 = -189
-7x = -189 + 168
-7x = -21
x = -21/ -7
x = 3
comprobación
3 + 6(4) = 27
3 + 24 = 27
27 = 27
7(3) - 3(4) = 9
21 - 12 = 9
9 = 9
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igual 0 la primera
x + 6y = 27=27-27=0
Respuesta:
9
Explicación paso a paso:
x + 6y = 27
7x - 3y = 9
-7x - 42y = -189
7x - 3y = 9
-45y = - 180
y = -180 /-45
y = 4
reemplazas en "y"
-7x - 42y = -189
-7x - 42(4) = -189
-7x - 168 = -189
-7x = -189 + 168
-7x = -21
x = -21/ -7
x = 3
comprobación
x + 6y = 27
3 + 6(4) = 27
3 + 24 = 27
27 = 27
7x - 3y = 9
7(3) - 3(4) = 9
21 - 12 = 9
9 = 9