Question

In one semester, Doug and Laura spent a combined $250$ hours in the tutoring lab. If Doug spent $40$ more hours in the lab than Laura did, how many hours did Laura spend in the lab?

Answer 1

Let the number of hours Laura spent on tutoring be $L$ Hours.
Given, number of hours Doug spent on tutoring $=40+L$
Total number of hours spent $=250$
$\Rightarrow L+40+L=250$
$\Rightarrow 2L=210$
$\Rightarrow L=105$
Thus, Laura spent $105$ hours in the lab.