-9r=20+1r

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Solution for -9r=20+1r equation: 


Simplifying
-9r = 20 + 1r

Solving
-9r = 20 + 1r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-9r + -1r = 20 + 1r + -1r

Combine like terms: -9r + -1r = -10r
-10r = 20 + 1r + -1r

Combine like terms: 1r + -1r = 0
-10r = 20 + 0
-10r = 20

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

Simplifying
r = -2

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