### Home > MC2 > Chapter 5 > Lesson 5.3.3 > Problem 5-113

5-113.

Combine like terms.

2*x*, *x*, and 3*x* are like terms because they share the variable *x* to the same power.

5 and −6 are like terms because they are both constants.

2*x* + *x* + 3*x* = 6*x* and 5 + −6 = −1

6*x* − 1

See part (a).