4r+8-4=16

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Solution for 4r+8-4=16 equation: 


Simplifying
4r + 8 + -4 = 16

Reorder the terms:
8 + -4 + 4r = 16

Combine like terms: 8 + -4 = 4
4 + 4r = 16

Solving
4 + 4r = 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 + 4r = 16 + -4

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

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

Divide each side by '4'.
r = 3

Simplifying
r = 3

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