Solving One-Step Subtraction Equations

Some linear equations can be solved with a single operation. For this type of equation, use the inverse operation to solve.

Example :

Solve for $n$ .

$x - 9 = 15$

The inverse operation of subtraction is addition. So, add $9$ to both sides.

$\begin{array}{l} x - 9 + 9 = 15 + 9 \\ x = 24 \end{array}$

Download our free learning tools apps and test prep books

Names of standardized tests are owned by the trademark holders and are not affiliated with Varsity Tutors LLC.

98% claim: 98% satisfaction claim based on a survey of 814 Varsity Tutors clients conducted during 2011.

Media outlet trademarks are owned by the respective media outlets and are not affiliated with Varsity Tutors.

Award-Winning claim based on CBS Local and Houston Press awards.

Varsity Tutors does not have affiliation with universities mentioned on its website.

Varsity Tutors connects learners with experts. Instructors are independent contractors who tailor their services to each client, using their own style, methods and materials.