Harriett's age is 3 more than 2 times Angela's age. If the sum of their ages is 51, how old is each girl?

Angela's age = 16 years

Harriett's age = 35 years

Step-by-step explanation:

Let Angela's age be x

Harriett's age = 2x + 3

x + 2x + 3 = 51

3x = 51 - 3

3x = 48

x = 48/3

x = 16

Angela's age = 16 years

Harriett's age = 35 years