Question 766466
Allen is 4 yr older than his brother Randy. Three years ago, Allen was twice as old as Randy. How old is each now? Please solve using system of equations if possible please.
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let x=Allen's present age
let y=Randy's present age
x=y+4
..
3 yrs ago:
x-3=Allen's age
y-3=Randy's age
x-3=2(y-3)
...
x=y+4
x-3=2(y-3)=2y-6
..
x-y=4
x-2y=-3
subtract:
y=7
x=7+4=11
..
Allen's present age=11
Randy's present age=7