84=4r-16

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Solution for 84=4r-16 equation:


Simplifying
84 = 4r + -16

Reorder the terms:
84 = -16 + 4r

Solving
84 = -16 + 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.
84 + -4r = -16 + 4r + -4r

Combine like terms: 4r + -4r = 0
84 + -4r = -16 + 0
84 + -4r = -16

Add '-84' to each side of the equation.
84 + -84 + -4r = -16 + -84

Combine like terms: 84 + -84 = 0
0 + -4r = -16 + -84
-4r = -16 + -84

Combine like terms: -16 + -84 = -100
-4r = -100

Divide each side by '-4'.
r = 25

Simplifying
r = 25

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