Zhi bought 18 tickets for games at a fair. each game requires 3 tickets. zhi wrote the
expression 18 - 3g to find the number of tickets she has left after playing g games.
diego correctly wrote another expression, 3(6-9), that will also find the number of
tickets zhi has left after playing g games.
use the drop-down menus to explain what each part of zhi's and diego's expressions
mean.