Terms
Example (3x)
Coefficient
to find the value of an expression by substituting a number for the variable
evaluate
undoes another operation
The inverse operation of 3 is (-3)
inverse operation
to get the variable by itself
Examples (x = or y =)
isolate
an expression that contains at least one variable
Example (3x +9)
algebraic expression
an expression that contains only numbers, no variables
Example (3 + 7)
a value that does not change
Example (x + 3 = 9)
constant
LCD - The LCD is used to eliminate fractions from an equation.
least common denominator
an equation with two or more variables
Example (y = xk and / or 10x +5y = 100)
literal equations
to find the value of a variable that makes an equation true
solve
a mathematical sentence showing two expressions are equal
Example (3x + 3 = 4)
equation
a symbol (often a letter) that represents an unknown quantity
Example (x)
variable