4r-4=20

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Solution for 4r-4=20 equation: 


Simplifying
4r + -4 = 20

Reorder the terms:
-4 + 4r = 20

Solving
-4 + 4r = 20

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 = 20 + 4

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

Combine like terms: 20 + 4 = 24
4r = 24

Divide each side by '4'.
r = 6

Simplifying
r = 6

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