Dallas and Lex both have money in the bank. Dallas has $120 and is taking
$10 out each week. Lex has $30 in his account and is saving $5 each week.
Which set of equations models this situation?
Dallas and Lex are both doing this in weeks, so we can use W as weeks. 120-10W indicates he takes out 10 a week, starting at 120. Lex starts at 30 and adds 5 a week.
