3r-13r=20

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Solution for 3r-13r=20 equation: 


Simplifying
3r + -13r = 20

Combine like terms: 3r + -13r = -10r
-10r = 20

Solving
-10r = 20

Solving for variable 'r'.

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

Divide each side by '-10'.
r = -2

Simplifying
r = -2

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