Question

the temperature at Kent is -7 degrees and increasing at 2.5 degrees per hour. The temperatire at row is 19 degrees decreasing at 4 degrees per hour. When will they be the same? and what temperatore?

let t = hours running time.
-7+2.5t = temperature at Kent at time t.
19-4.0t = temperature at row at time t.

Set them equal to each other and solve for t which will be the number of hours for the two temperatures to be the same.

Then use t and either equation to determine the final temperature.