Question

Lucy is k years old. She has a sister who
is three years younger than she is and
another sister who is five years less than
twice Lucy’s age. Write an expression, in
simplified form, for the sum of the three
girls’ ages.
Also looking forward on knowing how to do it (work)

Answer 1

lucy = k

1sister = k-2

2 sister = (k x 2) - 5

k+(k-2)+((k x 2)-5)