Charles is 19 years old. his grandfather is 67 years older than he. what was thee total age 9 years ago?
2 answers:
Answer:
87 years
Step-by-step explanation:
To find the total age 9 years ago you would subtract 9 from Charles's age only, 19. His grandfather is still always going to be 67 years older than he.
19 - 9 = 10
Add 10 and 67 together to find his grandfather's age back then.
10 + 67 = 77
Now add 10 and 77 together.
10 + 77 = 87
The total age 9 years ago was 87 years.
Today: x=19 y=67+19=86 9 years ago: x=19-9=10 y=86-9=77 The total age 9 years ago: x+y=10+77=87
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