Math Help - word problem involving functions?

1. word problem involving functions?

Harpreet travelled 112 km in the same time it took liam to travel 80 km. If harpreet's car travelled 18km/h faster that liam's, what was liam's speed?

Can anyone help me out? I'm terrible with word problems.

2. You need to remember that

$D = TV$.

Liam: $80 = TV$ which means $T = \frac{80}{V}$.

Harpreet: $112 = T(V + 18)$

$112 = \frac{80}{V}(V + 18)$

$112 = 80 + \frac{1440}{V}$.

Solve for $V$.

3. thanks a bunch