Question

samantha has an older brother. right now, he is twice her age. but 8 years ago, her brother was 3 times her age. how old is each person now

Answer 1

Equations:  

b=2s

b-8 = 3(s-8)

Substitute for B and solve for S

2s-8 = 3s-24

s=16 (Samanthas age now)

b=2s = 32 years (brothers age now)