Question

Simplify the expression by combing like terms.21v + 8 - 12v - 7 + 3t - t

Answer 1

We need to simplify the like terms.

"The like terms are whose with the same variable and exponent"

Therefore, the like terms are:

21v - 12v = 9v

8 - 7 = 1

3t - t = 2t

Now, the result is :

9v + 2t + 1

Hence, the correct answer is option D.