Find the variable
10 + K + 5 = 25
K = 10
A letter that represents an unknown number or quantity.
Variable
The result of adding two or more numbers or quantities.
Sum
10K + 5
K = 5
55
2 + 2
Addition
9 - K = -2
K = 11
A term with a fixed quantity because it has no variable.
Constant
The result of subtracting one number or quantity from another number or quantity.
Difference
K - 5
K = 55
50
81 / 9
Division
25K = 100
K = 4
A mathematical statement using an = sign to show two expressions are equal.
Equation
The result of multiplying two or more numbers or quantities.
Product
25 * 4
100
Multiplication
500/K = 62.5
K = 8
A single mathematical phrase using numbers, operations, and sometimes variables.
Expressions
The numeral factor a variable is multiplied by.
Coefficient
5,000 / 2
2,500
Subtraction, Division
(25/K) + 15 = 20
K = 5
A mathematical statement using a < or > sign to compare two unequal expressions.
Inequality
A number, variable, or combination of them in an expression separated from one another by a + or - sign.
Term
9 * K
K = 9
28
(100,000 / 10) * 10 + 1000
Division, Multiplication, Addition