R-(-10)=21

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Solution for R-(-10)=21 equation: 


Simplifying
R + -1(-10) = 21

Multiply -1 * -10
R + 10 = 21

Reorder the terms:
10 + R = 21

Solving
10 + R = 21

Solving for variable 'R'.

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

Add '-10' to each side of the equation.
10 + -10 + R = 21 + -10

Combine like terms: 10 + -10 = 0
0 + R = 21 + -10
R = 21 + -10

Combine like terms: 21 + -10 = 11
R = 11

Simplifying
R = 11

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