About this printable
Practice combining like terms with eight focused questions and a separate printable answer key. Each exercise has space for a written method, and the answers also appear as readable text below. Use the practice page first, then compare methods as well as final answers. The paired images stay together in this article so the solution can be found without searching for another post.
How to use it
Terms with the same variable part can be combined by adding their coefficients. For example, 3x + 2 + 4x + 5 becomes 7x + 7. Variable terms and constant terms stay in separate groups.
Check and adapt
Check the simplified expression by substituting a value for x into both forms. These examples contain x terms and constants only, with no powers or products of variables. Keep the constant separate instead of treating x as a label that can be dropped.
Answers in text
- 2x + 3 + 4x + 5: 6x + 8.
- 3x + 4 + 5x + 6: 8x + 10.
- 4x + 5 + 6x + 7: 10x + 12.
- 5x + 6 + 7x + 8: 12x + 14.
- 6x + 7 + 8x + 9: 14x + 16.
- 7x + 8 + 9x + 10: 16x + 18.
- 8x + 9 + 10x + 11: 18x + 20.
- 9x + 10 + 11x + 12: 20x + 22.
Printable answer key
Download and printing instructions
Use Download image to save the original high-resolution PNG. To make a PDF, choose US Letter or A4 below the image and select Download PDF. The website creates that file in your browser; no separate PDF attachment is needed. Match the printer paper setting to your choice, use uniform scaling and check that every edge fits inside the printable area. Print one test copy before making a classroom set. These are flat printable pages, not editable forms. Originals are for personal and classroom use; share the article link rather than redistributing the files.