37=.04*.5*r

Solution for 37=.04*.5*r equation:

Simplifying
37 = 0.04 * 0.5r

Multiply 0.04 * 0.5
37 = 0.02r

Solving
37 = 0.02r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-0.02r' to each side of the equation.
37 + -0.02r = 0.02r + -0.02r

Combine like terms: 0.02r + -0.02r = 0.00
37 + -0.02r = 0.00

Add '-37' to each side of the equation.
37 + -37 + -0.02r = 0.00 + -37

Combine like terms: 37 + -37 = 0
0 + -0.02r = 0.00 + -37
-0.02r = 0.00 + -37

Combine like terms: 0.00 + -37 = -37
-0.02r = -37

Divide each side by '-0.02'.
r = 1850

Simplifying
r = 1850