Total number of cans = N
number of weeks = w
The multiplier is 6.
Therefore the expression must be:
N = 6w
let's recall that an equilateral triangle has all interior angles of 60°.
Check the picture below.
so as you can see, 2√3 = x = r, namely the radius of the circle.

I think it would be:
22 + x = 118 for your equation.
And then to solve, it would be:
22 + x = 118
-22 -22
x = 96
Average length of black mamba = 96 inches
However it is late where I am so my bad if that’s not what you needed