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Cuadro.
8 y 6
z 5 w
4 x 2
Sumamos la diagonal de 8 + 5 + 2 = 15, entonces debe sumar 15 por todos los lados.
4 + x + 2 = 15
x + 6 = 15
x = 15 - 6
x = 9
8 + y + 6 = 15
y + 14 = 15
y = 1
8 + z + 4 = 15
z + 12 = 15
z = 15 - 12
z = 3
6 + w + 2 = 15
w + 8 = 15
w = 15 - 8
w = 7
Calcular.
x + y - (w + z) =
(9 + 1) - (7 + 3) =
10 - (10) =
10 - 10 =
0
Respuesta.
Opcion A