R-13=-20

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Solution for R-13=-20 equation: 


Simplifying
R + -13 = -20

Reorder the terms:
-13 + R = -20

Solving
-13 + R = -20

Solving for variable 'R'.

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

Add '13' to each side of the equation.
-13 + 13 + R = -20 + 13

Combine like terms: -13 + 13 = 0
0 + R = -20 + 13
R = -20 + 13

Combine like terms: -20 + 13 = -7
R = -7

Simplifying
R = -7

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