Theorem 3 Among the variables x, y, and Z, any one variable may be considered as a function of the other two. Thus,

x = x(y, z)

1.95

1.96

Similarly,

z = z(x, y)

1.97

1.98

Hence,

1.99

or,

1.100

or,

1.101

Hence,

1.102

or,

1.103