Question 991627: In 21 years' time, Martin will be seven times as old as he was 3 years ago.
1. Write this information in the form of an equation involving Martin's present age, 'a' years.
2. Solve this equation to find Martin's present age.
Found 2 solutions by Timnewman, MathTherapy:
Answer by Timnewman(323)   (Show Source):
You can put this solution on YOUR website! Hi dear,
Let a be martin's age.
In 21yrs time,
Martin's age=(a+21)yrs
3yrs ago,he was (a-3)yrs
But he will be 7times as old as he was 3yrs ago,
Then
a+21=7(a-3)
This is the equation of his age now.
Solving the above equation,
a+21=7a-21
7a-a=21+21
6a=42
a=6yrs
His age now is 6yrs
HOPE THIS HELPS?
::TIMNEWMAN::
Answer by MathTherapy(10552)  (Show Source):
You can put this solution on YOUR website!
In 21 years' time, Martin will be seven times as old as he was 3 years ago.
1. Write this information in the form of an equation involving Martin's present age, 'a' years.
2. Solve this equation to find Martin's present age.
Martin's current age: 
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