CPM Homework Help : CCA Problem 10-57

Marisol and Mimi walked the same distance from their school to a shopping mall. Marisol walked $2$ miles per hour, while Mimi left $1$ hour later and walked $3$ miles per hour. If they reached the mall at the same time, how far from the mall is their school?

Hint:

Since Marisol and Mimi both walked the same distance, write equations for each of their distances.
Be sure to define your variable, $t=$ ...

Partial Answer:

Let $t=$ amount of time Marisol walked

Marisol: $d=2t$
Mimi: $d=3\left(t-1\right)$

$t=3$ hours
Note: The question asks how far the mall is from their school.