13+5r=-20

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Solution for 13+5r=-20 equation: 


Simplifying
13 + 5r = -20

Solving
13 + 5r = -20

Solving for variable 'r'.

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

Add '-13' to each side of the equation.
13 + -13 + 5r = -20 + -13

Combine like terms: 13 + -13 = 0
0 + 5r = -20 + -13
5r = -20 + -13

Combine like terms: -20 + -13 = -33
5r = -33

Divide each side by '5'.
r = -6.6

Simplifying
r = -6.6

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