Magic number
Yes, you can add or subtract a number with a variable and a number without one, but they cannot be combined into a single term. For example, you can simplify the expression (3x + 5) to show that it consists of a variable term (3x) and a constant term (5), but they remain separate. The result is (3x + 5), not a single term.
a variable
Just the number, for example: 7x the variable is 7. The variable is the number without the variable(x,y,z, etc.)
Constant, perhaps scalar constant. Since you could have a constant vector or other object, as well.
a constant
A constant.
Constant? not positive
a single variable
single variable is a that variable which works witout the interaction of other.it does not concern with any other variable
In algebra, a term can either be a single number, a variable or a combination of a number and a variable. For example, in 3x + 2 = 11, the terms are 3x, 2 and 11.
Since the variable may be real or complex, there is no single word or phrase to describe such a thing.
That looks like the description of an EXPRESSION. However, an expression need not have "at least one operation"; a single number, or variable, is a perfectly valid expression.