<span>4x+7x+19=3 x 12 - 4+(5 x 16) - 5 </span><span>
7x+3-2x=4x+2 x 5 + 1
</span>
18 = x
__ __
5 4
x = 18•4 / 5
72/5 = 14.4 final answer
The average speed can be obtained by the formula:

If a boat travels 36 miles in 1.5 hours ans then in 14 miles in 0.75 hour, then find:
- total distance is 36+14=50 miles;
- total time: 1.5+0.75=2.25 hours.
Therefore,
miles per hour.
Answer:
miles per hour.