I need to write a matlab code that solve this system of equations:

x = 0.768(110-z)

x = 1.344(y-40)

x = (75*(1-0.004*t))*0.008522185*(((110-y)-(z-40))/ln((110-y)/(z-40)))

for t from 100 to 250 with 1000 increment!

Note that ln is natural log, I don't know what it should be in matlab!