10-10r+9r=11

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Solution for 10-10r+9r=11 equation: 


Simplifying
10 + -10r + 9r = 11

Combine like terms: -10r + 9r = -1r
10 + -1r = 11

Solving
10 + -1r = 11

Solving for variable 'r'.

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

Add '-10' to each side of the equation.
10 + -10 + -1r = 11 + -10

Combine like terms: 10 + -10 = 0
0 + -1r = 11 + -10
-1r = 11 + -10

Combine like terms: 11 + -10 = 1
-1r = 1

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

Simplifying
r = -1

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