Solve the equation. then check your solution. h-5.3=2.6
a.
–2.7
c.
7.9
b.
2.7
d.
13.78

h - 5.3 = 2.6
   +5.3   +5.3 (add 5.3 to both sides)

simplify
h = 7.9

answer is c.
7.9

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho