🔢 EXPRESSIONS
A number multiplied by a variable.
Coefficient
A letter that represents an unknown number.
Variable
The opposite of addition.
Subtraction
Solve: x + 4 = 10.
x=6
What is the coefficient of 8x?
8
The number without a variable in an expression.
Constant
A number that multiplies a variable.
Coefficient
The opposite of multiplication.
Division
Solve: x - 7 = 3.
x=10
How many terms are in 4x + 7 - 2x?
3
A mathematical phrase containing numbers, variables, and operations.
Expression
A mathematical statement containing an equals sign.
Equation
The opposite of division.
Multiplication
Solve: 2x = 14.
x=7
Identify the constant in 6x + 12
12
Terms that have the same variables raised to the same powers.
Like terms
The value that makes an equation true.
Solution
What operation would you use to undo +7?
Subtraction
Solve: x/3 = 5
x=15
Is 5x + 2 = 17 an expression or equation?
Equation
Simplify: 3x + 5 + 2x - 1.
5x+4
The difference between the greatest and least values in a data set.
Range
What operation would you use to undo ×5?
Division
Solve: 3x + 4 = 19
x=5
Simplify: 4(2x + 3) - 5x
3x+12