Answer:
9x -3
Step-by-step explanation:
Just combine like-terms like this:
13x -10x + 6x = 9x
4 + 3 - 10 = -3
1/8
1/4÷2
=1/8
6-3=3
T1=3+3=6 +3=9 +3=12 +3=15 +3=18
n=18