20r-18r-5r=18

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Solution for 20r-18r-5r=18 equation: 


Simplifying
20r + -18r + -5r = 18

Combine like terms: 20r + -18r = 2r
2r + -5r = 18

Combine like terms: 2r + -5r = -3r
-3r = 18

Solving
-3r = 18

Solving for variable 'r'.

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

Divide each side by '-3'.
r = -6

Simplifying
r = -6

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