John I'd running in a race. The race is 25miles long. After two hours, John has run 7 miles. How many miles, m, does John have left to run?

M=18 miles

25 - 7 = m

18

25-7=18

To find out how many miles John has left to run, we need to subtract the distance he has already run from the total race distance.

The total race distance is given as 25 miles, and John has run 7 miles so far. We can find out how many miles John has left by subtracting the distance he has already run from the total race distance:

Total distance - Distance already run = Distance left to run

Substituting the given values:

25 miles - 7 miles = Distance left to run

Simplifying the subtraction:

18 miles = Distance left to run

So, John has 18 miles left to run.