r-(-10)=15

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Solution for r-(-10)=15 equation: 


Simplifying
r + -1(-10) = 15

Multiply -1 * -10
r + 10 = 15

Reorder the terms:
10 + r = 15

Solving
10 + r = 15

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 = 15 + -10

Combine like terms: 10 + -10 = 0
0 + r = 15 + -10
r = 15 + -10

Combine like terms: 15 + -10 = 5
r = 5

Simplifying
r = 5

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