Barry Allen's older brother is only 3 years more than triple Barry's age. If the sum of their ages is 28, find their ages

B and a

barry=b

a=older bro

a is 3 more than 3b

a=3+3b

sum is 28

a+b=28

3+3b+b=28

3+4b=28

minus 3 both sides

4b=25

divide both sides by 4

b=6.25

a=3+3b

a=3+3 (6.25)

a=3+18.75

a=21.75

barry=6.25 years

21.75 years=older bro