Given:
The expression is:

To find:
The value of the given expression.
Solution:
We have,

It can be written as:



Therefore, the value of the given expression is 0.000008.
To solve for r, you would start by subtracting p from both sides.
2m - p = -q/r
Multiply everything by r.
2mr - pr = -q
Factor r out of the left side of the equation.
r(2m - p) = -q
Divide both sides by (2m - p).
r =
.