Answer:
sissy is 28
Step-by-step explanation:
let sissy's age be s at present , then
lito's age is s + 4 ( 4 years older than sissy )
In 3 years
sissy's age is s + 3
lito's age is s + 4 + 3 = s + 7
At this time the sum of their ages is 66 , that is
s + 3 + s + 7 = 66
2s + 10 = 66 ( subtract 10 from both sides )
2s = 56 ( divide both sides by 2 )
s = 28
That is sissy is 28 years old.