Allday Education

Free Combining Like Terms Worksheet

Ten expressions to simplify by combining like terms, plus a printable answer key.

Answer key included
Name: Date:
Combining Like Terms
1.
7x+3x557x + 3x - 5 - 5
2.
9x+7+3x159x + 7 + 3x - 15
3.
5x+12+126x5x + 12 + 12 - 6x
4.
4+6+x+4x-4 + 6 + x + 4x
5.
3x+8x+15+103x + 8x + 15 + 10
6.
6x+5+7+x6x + 5 + 7 + x
7.
4x+48x64x + 4 - 8x - 6
8.
4+6x9x+74 + 6x - 9x + 7
9.
x+4x4+14-x + 4x - 4 + 14
10.
8x+7+9+7x8x + 7 + 9 + 7x
Andy · alldayeverydaymath.com
Name: Answer KeyDate:
Combining Like Terms
1.
7x+3x557x + 3x - 5 - 5
Answer: 10x1010x - 10
2.
9x+7+3x159x + 7 + 3x - 15
Answer: 12x812x - 8
3.
5x+12+126x5x + 12 + 12 - 6x
Answer: x+24-x + 24
4.
4+6+x+4x-4 + 6 + x + 4x
Answer: 5x+25x + 2
5.
3x+8x+15+103x + 8x + 15 + 10
Answer: 11x+2511x + 25
6.
6x+5+7+x6x + 5 + 7 + x
Answer: 7x+127x + 12
7.
4x+48x64x + 4 - 8x - 6
Answer: 4x2-4x - 2
8.
4+6x9x+74 + 6x - 9x + 7
Answer: 3x+11-3x + 11
9.
x+4x4+14-x + 4x - 4 + 14
Answer: 3x+103x + 10
10.
8x+7+9+7x8x + 7 + 9 + 7x
Answer: 15x+1615x + 16
Andy · alldayeverydaymath.com

Scroll to see all 10 problems and the answer key on its own page. Printing includes every page.

About this worksheet

Like terms have the same variable part — combining them is how every longer expression gets tamed. This sheet mixes constants and variable terms in shuffled orders so students practice spotting the pairs, not just reading left to right.

Students shaky on the skill itself? Send them to the free lesson: Combining Like Terms — explained step by step.

Want this in multiple choice? Harder numbers? 30 versions?

Built for math teachers. Andy generates custom worksheets across Pre-Algebra, Algebra 1, Geometry, and Algebra 2 with exact answer keys.

Try it for $1