300=r*4

Solution for 300=r*4 equation:

Simplifying
300 = r * 4

Reorder the terms for easier multiplication:
300 = 4r

Solving
300 = 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
300 + -4r = 4r + -4r

Combine like terms: 4r + -4r = 0
300 + -4r = 0

Add '-300' to each side of the equation.
300 + -300 + -4r = 0 + -300

Combine like terms: 300 + -300 = 0
0 + -4r = 0 + -300
-4r = 0 + -300

Combine like terms: 0 + -300 = -300
-4r = -300

Divide each side by '-4'.
r = 75

Simplifying
r = 75