To learn, in general, how to set up and solve the above sort of exercise, try

**here**.

Once you have studied the above....

Note that they are moving in opposite directions, so their distances add together to get the total. Since the one car is defined in terms of the other, then:

i) Pick a variable to stand for the rate of "the other car".

ii)

**Create an expression**, in terms of the variable in (i), for the rate of the "one car".

iii) Note the given time value, and plug this and the variable from (i) into the "distance" equation "d = rt" to create an expression for the distance of "the other car".

iv) Note the given time value, and plug this and the expression from (ii) into the "distance" equation to create an expression for the distance of the "one car".

v) Recalling that their distances are additive, add the expressions from (iii) and (iv). Simplify.

vi) Set the expression from (v) equal to the given total distance.

vii) Solve the resulting

**linear equation** for the value of the variable.

viii) Use the definitions in (i) and (ii) to interpret your answer to (vii).

If you get stuck, please reply showing your work and reasoning so far. Thank you!