I need some help with this problem of the assignment?

you should try and plug in the different values of into the problem  

Step-by-step explanation:  Do this until the value of x that you plugged into the problem matches the solution to the equation.

The answer is 4.8

Step-by-step explanation:

The answer is 4.8 because 1.5h is half of 3 hours so if he walks 3.0m (which is double the first amount he walked) the answer will double.

so 2.4+2.4 = 4.8

or 2.4x2 = 4.8

And there u go!