Question 198588
Hey Kristie
Quick lesson for you.
Order of operations first
{{{9((5(c-4)+15)-(3(5c-2)+4))}}}
Inside most parentheses first, distribute the 5 into c-4 and 3 into 5c-2.
{{{9((5c-20+15)-(15c-6+4))}}}
Simplify the -20 with +15 and -6 with +4.
{{{9((5c-5)-(15c-2))}}}
Parentheses again, distribute the -1 with 15c-2.
{{{9(5c-5-15c+2)}}}
Simplify, 5c with -15c and -5 with +2.
{{{9(-10c-3)}}}
Distribute the 9.
{{{-90c-27}}}

Anymore questions feel free to ask me.
Anthony Allie
arallie@gmail.com
http://arallie.webs.com/tutoring.htm