Question 1199506
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The other tutor supplied a good response showing a standard solution method using formal algebra.  Since you are presumably studying algebra, you should understand his solution.<br>
But you can get come good mental exercise (and good problem-solving practice) by solving the problem informally using logical reasoning and simple mental arithmetic.<br>
The downstream speed is 32/1 = 32mph; the upstream speed is 32/4 = 8mph.<br>
The downstream speed is the speed of the boat PLUS the speed of the current; the upstream speed is the speed of the boat MINUS the speed of the current.  Logical analysis then tells us that the speed of the boat is halfway between 32mph and 8mph, which is 20mph.  And that makes the speed of the current 12mph.<br>
ANSWERS: boat speed 20mph, current speed 12mph<br>