Variables, Expressions and Equations SOL 5.19

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number that can change or vary.

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operations (like addition or multiplication) that represents a value.

Front

What is an equation?

Back

An equation is a mathematical statement that shows that two expressions are equal, often using the '=' sign.

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

In the equation 2x = 6, what does 'x' represent?

Back

In the equation 2x = 6, 'x' is the variable that we need to find.

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, you perform operations to get the variable on one side of the equation and the constant on the other.

Front

What is the first step to solve the equation p - 54 = 327?

Back

The first step is to add 54 to both sides of the equation to isolate 'p'.

Front

If Bob has 28 stickers and they have a total of 57 stickers with Emily, how do you write the equation?

Back

The equation is 28 + s = 57, where 's' is the number of stickers Emily has.

Front

What does 'decreased by' mean in an equation?

Back

'Decreased by' means to subtract a number from another number.

Front

How do you represent 'a number, z, decreased by 36 is 248' in an equation?

Back

The equation is z - 36 = 248.