The variable in the expression 9x+329 is ___.
The variable in the expression {9x +32} ÷ 9 is ___ .
The variable in the expression 9x+32 is ___.
The variable in the expression 9x−36 is x.
Which of the following equations is not a linear equation in one variable? A. 9x−9=9B. 2x−2y=2C. x−52=52D. 4−4x=44