A solution for x in an algebraic expression where the result is 3 might be for example, 4 - x = 1. You can solve by adding "x" to each side of the equation (4 = 1 + x) then subtracting 1 from both sides (3 = x, or x=3).
You have to substitute a value for the letter variable in the expression. This is what we call evaluating the algebraic expression. An example would be 3x+1=7, when x=2.
As an algebraic expression it is simply: 18-x
what is a variable expression that has a decreasing value as the value of thevariable increases?
Value
Yes
When the value of a variable in an algebraic expression changes, the value of the expression can change.
7
Take the value of each variable in the expression and replace the variable by its value. Then do the math!
Replace each variables in the algebraic expression by its [known] value and calculate the value (ie evaluate) of the algebraic expression.
to solve for the variable
you have to deduce the variable and evaluate the expression.
You have to substitute a value for the letter variable in the expression. This is what we call evaluating the algebraic expression. An example would be 3x+1=7, when x=2.
322
The answer to the question is given in the question!If you want to find the value of an algebraic expression, then you need to substitute numerical values for each of the variables in the expression, and then calculate and simplify the result.
As an algebraic expression it is simply: 18-x
x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.
You have to substitute a value for the letter variable in the expression. This is what we call evaluating the algebraic expression. An example would be 3x+1=7, when x=2.