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In algebra, variables are represented by letters such as x. A variable could be any number. That number is the "value" of the variable.
In an expression, you can choose a number to put in for x, and simplify to get a number which is the value of the expression.
In an equation, you can solve for the value of x, which will be the value of x which makes the equation true.
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Is eliminating variables from equations equal to find the value of the variables?
No, but eliminating variables is one of several ways to find the value of variables in a system of equations.
What does the value of an expression mean?
If you replace variables in an expression by numbers (in case there are any variables) and then do the indicated operations, you get a number. That final number is the "value" of the expression.
What does it mean to solve a system?
Finding a set of value for the set of variables so that, when these values are substituted for the corresponding variables, all the equations in the system are true statements.
What is a constant value that are not coefficients of variables to equations?
parameters
What have you learned about variables?
1) I learned that you can have as many variables as you want. 2) You can change the variables. 3) Variables is used in an experiment. 4) A variable is something that can be changed, such as a characteristic or value. Variables are generally used in Psychology experiments to determine if changes to one thing result in changes to another.
