SOLUTION: his grandpa's 84 and his mom is 46 how many years ago was grandpa twice her age.
Algebra.Com
Question 999503: his grandpa's 84 and his mom is 46 how many years ago was grandpa twice her age.
Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
let x = the number of years ago.
you get 84 - x = 2 * (46 - x)
that results in 84 - x = 92 - 2x
add 2x to both sides of this equation and subtract 84 from both sides of this equation to get:
x = 8
he's 84 now.
8 years ago he was 76
she's 46 now.
8 years ago she was 38
2 * 38 = 76
looks like we did good.
answer is the age of grandpa was 2 times the age of mom 8 years ago.
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