1. equivalent expression
Vocabulary – Module 3
variable
numerical expression
expression
equivalent expression
term
coefficient

2. Combining Like Terms (addition)
Rewrite 5x + 3x and 5x – 3x
5x + 3x x – 3x = _________________________
5x: _______________ x: ________________
3x: _______________ x: ________________
Find the sum of 2x + 1 and 5x.
Find the sum of -3a + 2 and 5a – 3

3. Combining Like Terms (addition)
For problems 1 – 3 write equivalent expressions by combining like terms. Verify the equivalence of your expression by evaluating each for the given values: a= 2, b = 5, and c= -3
1. 3a + 5a
2. 8b – 4b
5c + 4c + c