Vocabulary – Module 3• variable

• numerical expression• expression

• equivalent expression• term

• coefficient

Combining Like Terms (addition)a. Rewrite 5x + 3x and 5x – 3x

5x + 3x 5x – 3x = _________________________

5x: _______________ 5x: ________________3x: _______________ -3x: ________________

b. Find the sum of 2x + 1 and 5x.

c. Find the sum of -3a + 2 and 5a – 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

3. 5c + 4c + c