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The sum of the ages of Carter and Maisha is 77 years.
10 years ago, Carter's age was 2 times Maisha's age.
How old is Carter now?
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10 years ago, the sum of Carter and Maisha ages was 77-10-10 = 57,
and Carter's age was twice Maisha's age.
From it, easy mental effort tells you that 10 years ago
Maisha was 57/3 = 19 years old, while Carter was 2*19 = 38 years old.
Hence, now Maisha is 19+10 = 29 years old, while Carter is 38+10 = 48 years old.
CHECK. 29 + 48 = 77 years. ! Correct !
Solved and explained.