Three years ago, sharon was (8+b) years old and nora was (2b-1) years old. lupe will be 3b years old in 2 years. write an expression in simplest form for the present day sum of the three girls' ages?

Three years ago

S = 8 + b

N = 2b - 1

In two years

L = 3b

Add 3 to the first 2 expressions and minus 2 from the second

11 + b + 2b + 2 + 3b - 2

11 + 2 - 2 + b + 2b + 3b

11 + 6b

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