She pulled out her phone and quietly searched for the online solution guide. The screen glowed with the familiar layout of the textbook. There it was: Problem 14. She scrolled down, ready to copy the numbers, but then she paused. The site didn't just give the answer; it showed a diagram of the trains moving toward each other.
Masha sighed. She didn’t want jelly for a brain, but she also didn't want to spend her entire afternoon trapped in a world of locomotives and long division. She pulled out her phone and quietly searched
"Petya," she whispered, leaning toward her neighbor. "Do you have the answer?" ready to copy the numbers
Suddenly, the coal made sense. The speeds were additive. The distances were shrinking. " she whispered