r-(-2)=15

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Solution for r-(-2)=15 equation: 


Simplifying
r + -1(-2) = 15

Multiply -1 * -2
r + 2 = 15

Reorder the terms:
2 + r = 15

Solving
2 + r = 15

Solving for variable 'r'.

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

Add '-2' to each side of the equation.
2 + -2 + r = 15 + -2

Combine like terms: 2 + -2 = 0
0 + r = 15 + -2
r = 15 + -2

Combine like terms: 15 + -2 = 13
r = 13

Simplifying
r = 13

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