Answer:
Lena is 3 now
Sasha is 9 now
Step-by-step explanation:
L = Lenas age
S = sasha age
Now
S = L+6
In 3 years
(S+3) = 2(L+3)
Substitute the first equation into the second
( L+6+3) = 2(L+3)
Combine like terms and distribute
L+9 = 2L+6
Subtract L from each side
L+9-L = 2L -L+6
Subtract 6 from each side
9-6 =L+6-6
Lena is 3 now
Sasha is L+3 = 3+6 = 9 now
