7 7/9
chamge 11 2/3 to improper faction and multiply <span />
I'm pretty sure that it's b. That's assuming that you find the negative of b^2 and not the square of negative b.
-16+-x/4=-3
-x/4=13
-x=52
x=-52
Explanation is in the file
tinyurl.com/wpazsebu
N = 13/20 or 0.65
25.5n - 3 = 5.5n + 10
Add 3 to both sides of the equation.
25.5n = 5.5n + 13
Subtract 5.5n from both sides.
20n = 13
Divide both sides by 20.
n = 13/20 or 0.65
