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It is an expression with a variable, x.It is an expression with a variable, x.It is an expression with a variable, x.It is an expression with a variable, x.
Yes. A variable by itself, or anything that contains a variable, would be a variable expression (unless the variable cancels out, as in "x - x", which always has the same value).
'x' is a fixed but unknown amount. It is not a VARIABLE!!!!
the letter in 2x+6. The variable is the x.
They are: x and y and the expression can be simplified to 6xy