Question 13380
Your first step in solving this equation is to use the distributive property to get rid of the parentheses in the equation.  Since there is a negative sign in front of the (8a-4b), you have to distribute that across the parentheses.  This gives you {{{-8a + 4b + 5 -12b -6 - 8}}}}.  Now, you can combine like terms to get {{{-8a - 8b - 9}}}.  This is as simplified as this equation can get.