simplified what is:
5+3.2n−6−4.8n=?
and also what is:
4x+3−9x=?
5+3.2n−6−4.8n =
[ 5 - 6] + [ 3.2n - 4.8n] =
- 1 - 1.6n
4x+3−9x =
4x - 9x + 3
-5x + 3
+194 
