5n+8=43
43-8 = 35
35/5 = 7
n=7
-1.5(4-n)+2.8
multiply 4-n by -1.5
multiply to both the 4 and -n
-6+1.5n+2.8
add -6+2.8 since they are similar
-3.2+1.5n
1.5n-3.2
I believe this is the simplest form
78.6 = Seventy eight and six tenths.
The answer is −10d4+17d2s−6s2
