Addition/Subtraction Equations

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions, typically containing 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 isolating a variable in an equation?

Back

Isolating a variable helps to find its value by getting it alone on one side of the equation.

Front

What is the first step to solve the equation r - 12 = 25?

Back

Add 12 to both sides of the equation.

Front

What is the solution to the equation x - 40 = 56?

Back

x = 96.

Front

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

Back

Substitute the solution back into the original equation to see if both sides are equal.

Front

What is the solution to the equation 15 = n + 7?

Back

n = 8.

Front

What does it mean if an equation has no solution?

Back

It means there is no value for the variable that can make the equation true.

Front

What is the solution to the equation 99 = 51 - y?

Back

y = -48.

Front

What is the relationship between addition and subtraction in equations?

Back

Addition and subtraction are inverse operations; solving an equation often involves using one to undo the other.