20+12r-11r=-20+3r

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Solution for 20+12r-11r=-20+3r equation: 


Simplifying
20 + 12r + -11r = -20 + 3r

Combine like terms: 12r + -11r = 1r
20 + 1r = -20 + 3r

Solving
20 + 1r = -20 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
20 + 1r + -3r = -20 + 3r + -3r

Combine like terms: 1r + -3r = -2r
20 + -2r = -20 + 3r + -3r

Combine like terms: 3r + -3r = 0
20 + -2r = -20 + 0
20 + -2r = -20

Add '-20' to each side of the equation.
20 + -20 + -2r = -20 + -20

Combine like terms: 20 + -20 = 0
0 + -2r = -20 + -20
-2r = -20 + -20

Combine like terms: -20 + -20 = -40
-2r = -40

Divide each side by '-2'.
r = 20

Simplifying
r = 20

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