r+4=84

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Solution for r+4=84 equation: 


Simplifying
r + 4 = 84

Reorder the terms:
4 + r = 84

Solving
4 + r = 84

Solving for variable 'r'.

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

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

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

Combine like terms: 84 + -4 = 80
r = 80

Simplifying
r = 80

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