R-5.5=7.5

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Solution for R-5.5=7.5 equation: 


Simplifying
R + -5.5 = 7.5

Reorder the terms:
-5.5 + R = 7.5

Solving
-5.5 + R = 7.5

Solving for variable 'R'.

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

Add '5.5' to each side of the equation.
-5.5 + 5.5 + R = 7.5 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + R = 7.5 + 5.5
R = 7.5 + 5.5

Combine like terms: 7.5 + 5.5 = 13
R = 13

Simplifying
R = 13

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