r-9=10

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Solution for r-9=10 equation: 


Simplifying
r + -9 = 10

Reorder the terms:
-9 + r = 10

Solving
-9 + r = 10

Solving for variable 'r'.

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

Add '9' to each side of the equation.
-9 + 9 + r = 10 + 9

Combine like terms: -9 + 9 = 0
0 + r = 10 + 9
r = 10 + 9

Combine like terms: 10 + 9 = 19
r = 19

Simplifying
r = 19

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