Answer:
- -17.9
- 2n -7.4
Step-by-step explanation:
In each case, the only "like" terms are the constants. They are added together in the usual way.
1. -2.8 +0.9 -12 -4 = 0.9 -(2.8 +12 +4) = 0.9 -18.8 = -17.9
2. 2n +5.5 -0.9 -8 -4 = 2n +5.5 -(0.9 +8 +4) = 2n +5.5 -12.9 = 2n -7.4
