Ayudenme con un metodo de sustitucion
X + y = 11
½x + y = 7
X + y = 11
½x + y = 7
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2) (1/2)x + y = 7
Despejar "y" de 1)
y = 11 - x
Sustituir en 2)
(1/2)x + (11 - x) = 7
(x + 22 - 2x) / (2) = 7
22 - x = 14
x = 22 - 14
x = 8
Sustituir en:
y = 11 - 8
y = 3
Respuesta: x = 8 ; y = 3
Comprobación
8 + 3 = 11
11 = 11
(1/2)(8) + 3 = 7
4 + 3 = 7
7 = 7