You can
put this solution on YOUR website! Michael is 2 times as old as Christopher.
M = 2C
20 years ago, Michael was 6 times as old as Christopher.
M-20 = 6(C-20)
System of equations
M = 2C
M-20 = 6(C-20)
2C-20 = 6(C-20)
2C-20 = 6C-120
-4C = -100
C = 25
Christopher is 25
Michael is 2 times as old as Christopher.
Michael is 50.
Checking: 20 years ago, Michael was 30 and Christopher was
only 5, and 30 is 6 times 5.
Edwin
