9d - 3 = 8d + 12

Math help plz

Which expression is equivalent to 5r6141 2r+st6

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

Write the expression as a single natural logarithm. 2 in a - 4 in y