r+9-1=19

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Solution for r+9-1=19 equation: 


Simplifying
r + 9 + -1 = 19

Reorder the terms:
9 + -1 + r = 19

Combine like terms: 9 + -1 = 8
8 + r = 19

Solving
8 + r = 19

Solving for variable 'r'.

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

Add '-8' to each side of the equation.
8 + -8 + r = 19 + -8

Combine like terms: 8 + -8 = 0
0 + r = 19 + -8
r = 19 + -8

Combine like terms: 19 + -8 = 11
r = 11

Simplifying
r = 11

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