From the info given we have the following coordinates for X, Y and Z
X=(7,11)
Y=(10,14)
Z=(8,7)
And we know that after a translation the coordinates of X' are:
X'=(5,11)
We need to find the function for the transformation so we can do this:
And then the transformation would be:
With this transformation we can find the coordinates for Y' and Z' like this:
So then the coordinates fo Z are (6,7)