Writing Algebraic Expressions & Equations

Front

What is an algebraic expression?

Back

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols. For example, 3x + 5 is an algebraic expression.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value of the variable that makes the equation true.

Front

Solve the equation: 3x = 27.

Back

x = 9

Front

Solve the equation: x + 4 = 17.

Back

x = 13

Front

Write an algebraic expression for the phrase: 'a number less than 5'.

Back

x - 5

Front

What is the difference between an expression and an equation?

Back

An expression does not have an equality sign, while an equation does. For example, 2x + 3 is an expression, while 2x + 3 = 7 is an equation.

Front

Solve the equation: 4x + 7 = 23.

Back

x = 4

Front

Write an algebraic expression for the phrase: 'a number added to 19'.

Back

19 + n

Front

What is a variable in algebra?

Back

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

Front

What does 'less than' mean in algebraic expressions?

Back

'Less than' indicates subtraction. For example, '5 less than x' is written as x - 5.