Question

Si a/9 = b/3 = c/2 y a+b = 72, calcule a-c

Answer 1

Respuesta:

a-c=42

Explicación paso a paso:

a/9=9k

b/3=3k

c/2=2k

entonces:

a+b = 72

9k+3k = 72

k = 6

resolvemos:

a = 9k = 9(6) = 54

c = 2k = 2(6) = 12

remplazamos:

a-c = 54-12 = 42