Adding and Subtracting Expressions

Front

What is the result of (10x + 2) - (8x - 4)?

Back

2x + 6

Front

What is the result of (5x - 6) - (x + 2)?

Back

4x - 8

Front

What is the result of 5(x-4) + (2x-7)?

Back

7x - 27

Front

What is the result of (2x + 3) + (x + 5)?

Back

3x + 8

Front

What is the result of (x + 4) + (3x + 9)?

Back

4x + 13

Front

Define 'expression' in mathematics.

Back

An expression is a combination of numbers, variables, and operators (such as + and -) that represents a value.

Front

What does it mean to 'combine like terms'?

Back

Combining like terms means to add or subtract terms that have the same variable raised to the same power.

Front

What is the distributive property?

Back

The distributive property states that a(b + c) = ab + ac, allowing you to multiply a single term by two or more terms inside a parenthesis.

Front

What is a variable in an expression?

Back

A variable is a symbol (usually a letter) that represents an unknown value in an expression or equation.

Front

What is the difference between an expression and an equation?

Back

An expression is a mathematical phrase without an equality sign, while an equation states that two expressions are equal.