SOLUTION: A man is twice as old as his son. Ten years ago, he was thrice as old as the son. what is the man's age today?
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Question 1028386: A man is twice as old as his son. Ten years ago, he was thrice as old as the son. what is the man's age today?
Answer by LinnW(1048) (Show Source): You can put this solution on YOUR website!
Set M = man's age
S = son's age
M = 2S
M - 10 = 3(S - 10)
Substitute 2S for M in M - 10 = 3(S - 10)
2S - 10 = 3(S - 10)
2S - 10 = 3S - 30
add -2S to each side
- 10 = S - 30
add 30 to each side
20 = S
Since M = 2S
M = 2(20) = 40
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