Question

Walter buys a bus pass for $30 every time he rides the bus money is deducted from the value of the pass he rode 12 times and $24 was deducted

Answer 1

so each time, 24/12 or $2 was deducted per trip

he has 30-24=$6 left

$6/$2=3, he has 3 trips left

I wonder what your question is