8r+13r+11r+-11r+-20r=-18

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Solution for 8r+13r+11r+-11r+-20r=-18 equation: 


Simplifying
8r + 13r + 11r + -11r + -20r = -18

Combine like terms: 8r + 13r = 21r
21r + 11r + -11r + -20r = -18

Combine like terms: 21r + 11r = 32r
32r + -11r + -20r = -18

Combine like terms: 32r + -11r = 21r
21r + -20r = -18

Combine like terms: 21r + -20r = 1r
1r = -18

Solving
1r = -18

Solving for variable 'r'.

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

Divide each side by '1'.
r = -18

Simplifying
r = -18

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