What does variables mean in math with sentence?

Answer 1

I'm assuming you mean what is a variable. A variable is a letter that is used to take the place of a number. That letter can be any number. One example is 1+x=2 So x would equal 1. But in most cases the variables are solved for with more complex problems. Also, you may not be solving for the variable at all, it might be a placeholder.

______________________________________________________________

• In elementary mathematics, a variable is an alphabetic character representing a number which is either arbitrary or not fully specified or unknown.
• Making algebraic computations with variables as if they were explicit numbers allows one to solve a range of problems in a single computation.
• A typical example is the quadratic formula, which allows to solve every quadratic equation by simply substituting the numeric values of the coefficients of the given equation to the variables that represent them.
• The concept of variable is also fundamental in calculus. Typically, a function y = f(x) involves two variables, its argument x and its value y. The term "variable" comes from the fact that, when the argument (also called the "variable of the function") varies, then the value varies accordingly.
• So, variables are (usually) letters or other symbols that represent unknown numbers or values.
• The following are examples of algebraic expressions and equations containing variables.
  • 2x + 5 = 10, the variable here is x
  • 7y + 10 = 24, the variable here is y
  • a2 + b2, the variables here are a and b
• Refer to link below for more information