Alfonso is 20 years older than Kendra. Seven years ago, the sum of their ages was 54. How old are they now?

Alfonso's age=x

Kendra's age=y

y+20=x

(x-7)+(y-7)=54

x+y=68

x-y=20

2x=88

x=44

y+20=44

y=24

Kendra is 24 while Alfonso is 44