There is no relevant variable.
s + 9
The expression is 9*x.
Call your number any variable, for example x. Then: "A number": x "The opposite of a number": -x "Is": the equal sign. "The opposite of a number is -9": -x = -9
9+2n=5n this is how you would set up the problem 9+2n-2n=5n-2n then you subtract the number with the variable on each side 9=3n this is what it leaves you with 9/3=3n/3 then you divide three by both sides to get the variable by itself 3=n then you have your answer Hope this helps you!!
x9
If the question is, "What is the coefficient of 9b2 ?".......then the answer is 9.
a variable minus a number and the same variable is b-6b= -5b
the number next to a variable that multiplies the variable
Just the number, for example: 7x the variable is 7. The variable is the number without the variable(x,y,z, etc.)
We call a number that has no variable attached to it, a constant. A number attached to a variable, as in 3x, is called a coefficient.
the coefficient of the variable
Yes since a number and a variable and a number are a symbol.