Activities done by Eric on Tuesday = Dog Walking and Dog Sitting
Money earned by Eric by dog sitting = $45
Let the number of dogs walked by Eric be = a
And money earned per dog walk = b
⇒ Total Money Earned = Money earned by dog walking + Money earned by dog sitting
⇒ 168 = 25 + a×b
⇒ 143 = a×b
Hence, the equation used to determine number of dogs walked is a×b=143, where a represents number of dogs walked and b represents money earned per dog walk.
