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.
what is a variable expression that has a decreasing value as the value of thevariable increases?
The verbal expression that represents the algebraic expression 2x-8 is "twice a number decreased by 8." In this expression, "2x" represents twice the value of a variable "x," and "-8" indicates that 8 is being subtracted from that value. Therefore, "twice a number decreased by 8" accurately describes the algebraic expression 2x-8.
Value
The algebraic expression for p multiplied by 3 is 3p. This is written as the coefficient (3) multiplied by the variable (p). In algebra, when a number is placed next to a variable without an explicit multiplication sign, it is understood to be multiplication. Therefore, 3p represents three times the value of p.
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.
x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.
To find the value of an algebraic expression is to evaluate it.
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.