You can put this solution on YOUR website!
Let x= brother's age now
2x = John's age now
x-4 = brother's age 4 years ago
2x-4 = John's age 4 years ago
John's age 4 years ago was four times the brother's age 4 years ago.
Subtract 2x from each side:
Add + 16 to each side:
Brother = 6 now
John = 12 now
Four years ago, John was 8 and Brother was 2, which is 4 times as old.
Dr. Robert J. Rapalje, Retired