## Algebra 1

$abs (200 - 18t) = d$ We want a distance of 120 feet (and also -120 feet, as my friend would still be deemed 120 feet away from me). $200 - 18t = 120$ $200 - 18t - 120 + 18t = 120 - 120 + 18t$ $80 = 18t$ $80/18 = 18t/18$ $4.444 = t$ $200 - 18t = -120$ $200 - 18t +120 +18t = -120 +120 + 18t$ $320 = 18t$ $320/18 = 18t/18$ $17.77 = t$