Problema Solution
Sarah is twice as old as Anna. Ten years ago, the sum of their ages was 46 years. How old is Sarah.
Answer provided by our tutors
Let
x = Anna's age now
x - 10 = Anna's age 10 years ago
2x = Sarah's age now
2x - 10 = Sarah's age 10 years ago
10 years ago, the sum of their ages was 46 years means:
(x - 10) + (2x - 10) = 46
........
click here to see the equation solved for x
........
x = 22 years
Sarah is 22 years old now.