Adding and Subtracting Equations

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing one or more variables.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value(s) of the variable(s) that make the equation true.

Front

What is the purpose of adding in equations?

Back

Adding in equations is used to isolate a variable or to find the total when combining quantities.

Front

What is the purpose of subtracting in equations?

Back

Subtracting in equations is used to isolate a variable or to find the difference between quantities.

Front

If x + 10 = 20, what is the value of x?

Back

x = 10.

Front

If y - 5 = 15, what is the value of y?

Back

y = 20.

Front

What is the inverse operation of addition?

Back

The inverse operation of addition is subtraction.

Front

What is the inverse operation of subtraction?

Back

The inverse operation of subtraction is addition.

Front

How do you check if your solution to an equation is correct?

Back

You can check your solution by substituting the value back into the original equation to see if both sides are equal.

Front

What is a variable in an equation?

Back

A variable is a symbol, often a letter, that represents an unknown value in an equation.