Question 570717
let 
Present age of Suzan = s
Present age of Ray = r


Suzan is 7years older than her brother Ray
s=r+7............(1)

Sum of their ages is 41
s+r=41.........(2)


Put the value of s from (1) to (2)


r+7+r=41
2r=41-7
2r=34
2r/2=34/2
r=17


Put the value of r in (1)

s=r+7
s=17+7
s=24


Present age of Suzan = s = 24 years old
Present age of Ray = r = 17 years old