Respuesta :

glassmirror
let 54 = be Eric's father's age now
let x = be Eric's age now
54 - 12 = 7(x-12)
42 = 7x - 84
42 + 84 = 7x
126 = 7x
18 = x
THEREFORE, ERIC'S AGE IS 18

Answer: 18

Step-by-step explanation:

54 - 12 = 42 (dads age 12 years ago) 42 / 7 = 6 (divided by 7 because he was 7 times as old as him 6 + 12 (the age the son was 12 years ago plus the years that have passed since then)