R-1=9

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Solution for R-1=9 equation: 


Simplifying
R + -1 = 9

Reorder the terms:
-1 + R = 9

Solving
-1 + R = 9

Solving for variable 'R'.

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

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

Combine like terms: -1 + 1 = 0
0 + R = 9 + 1
R = 9 + 1

Combine like terms: 9 + 1 = 10
R = 10

Simplifying
R = 10

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