r-5x=20

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Solution for r-5x=20 equation: 


Simplifying
r + -5x = 20

Solving
r + -5x = 20

Solving for variable 'r'.

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

Add '5x' to each side of the equation.
r + -5x + 5x = 20 + 5x

Combine like terms: -5x + 5x = 0
r + 0 = 20 + 5x
r = 20 + 5x

Simplifying
r = 20 + 5x

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