4+r=16

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Solution for 4+r=16 equation: 


Simplifying
4 + r = 16

Solving
4 + r = 16

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 = 16 + -4

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

Combine like terms: 16 + -4 = 12
r = 12

Simplifying
r = 12

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