## Basic College Mathematics (10th Edition)

Marcella worked for $11$ hours while Tim worked for $8$ hours.
1. Solve for $x$ Let $x =$ Marcella's working time on the room (Tim's time) $+$ (Marcella's time) $= 19$ $(x - 3) + (x) =19$ $x - 3 + x = 19$ $2x - 3 = 19$ $2x = 22$ $x = 11$ 2. Use $x$ to find each person's working time Marcella $= 11$ hours Tim $= (x - 3) = (11 - 3) = 8$ hours