Solve Lorentz Transformation Homework: Find t When t'=10s

[harvellt]

Homework Statement

A clock is moving past us at speed v=\frac{c}{2} reads t^{'}=0 when our clock read t=0. Using the Lorentz tranformation, find out what our clock will read when the moving clock reads 10s.

Homework Equations

t=\gamma(x^{'}+\frac{Vt^{'}}{c^{2}})

The Attempt at a Solution

Alright so I know I have this one wrong if I use the equation for time dilation I get 11.5 seconds and it is correct, but I am having trouble using the lorenz transformation to get the same answer. For x^{'} I am using the equation Vt=x and get 5cs (light seconds), but I am ending up with a t=14. seconds.
I have some small silly disconnect somewhere. Help?

 

[aPhilosopher]

our clocks will read 0. What does the question really say?

 

[harvellt]

that s wasnt real sorry and fixed the rest of the problem should be a little better now