-4+r+20=

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Solution for -4+r+20= equation: 


Simplifying
-4 + r + 20 = 0

Reorder the terms:
-4 + 20 + r = 0

Combine like terms: -4 + 20 = 16
16 + r = 0

Solving
16 + r = 0

Solving for variable 'r'.

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

Add '-16' to each side of the equation.
16 + -16 + r = 0 + -16

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

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

Simplifying
r = -16

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