Question

18. Remove the parentheses from the following expression, and combine like terms: (a + b – c) + 3a – 2c

Answer 1

For this case we have the following expression:

$(a + b + c) + 3a-2c$

We eliminate parentheses:

$a + b-c + 3a-2c =$

We add similar terms:

$a + 3a + b-c-2c =$

We have that equal signs are added and the same sign is placed, while different signs are subtracted and the sign of the major is placed, then:

$4a + b-3c$

Answer:

$4a + b-3c$

Option B

Answer 2

Combine (or subtract) like terms.

a + b – c + 3a – 2c

4a + b – 3c <-------------------Answer

So, Choice B.