<span>"Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '-2b' to each side of the equation.
4 + b + -2b = -5 + 2b + -2b
Combine like terms: b + -2b = -1b
4 + -1b = -5 + 2b + -2b
Combine like terms: 2b + -2b = 0
4 + -1b = -5 + 0
4 + -1b = -5
Add '-4' to each side of the equation.
4 + -4 + -1b = -5 + -4
Combine like terms: 4 + -4 = 0
0 + -1b = -5 + -4
-1b = -5 + -4
Combine like terms: -5 + -4 = -9
-1b = -9
Divide each side by '-1'.
b = 9
Simplifying
b = 9"- geteasysolution.com</span>
y/x = 3/1 Triangle 1 is similar to triangle 3
y = 3 x Multiply each side by x
Reflection of a function

reflection of f(x) about x-axis
So
With the information, you gave me, I know that n is a variable that needs to be solved for. If you did not provide enough information, for some reason and that was the wrong concept, comment below and I'll help you out.
Also a rule to keep in mind is "What you do to one side, you do to the other."
The image attached shows you how the problem is done.
If you have any questions, just comment them below! :)
Let's call them A B and C.
ABC
ACB
BAC
BCA
CAB
CBA
so there's 6 different ways