5/14z -1/3z +1/7z =1/4 gjvjubnt htibnm
5/14z - 1/3z + 1/7z = 1/4 1/42z + 1/7z = 1/4 1/6z = 1/4 z = 1/4 / 1/6 z = 3/2
1.1/2