r-(-7)=13

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Solution for r-(-7)=13 equation: 


Simplifying
r + -1(-7) = 13

Multiply -1 * -7
r + 7 = 13

Reorder the terms:
7 + r = 13

Solving
7 + r = 13

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + r = 13 + -7

Combine like terms: 7 + -7 = 0
0 + r = 13 + -7
r = 13 + -7

Combine like terms: 13 + -7 = 6
r = 6

Simplifying
r = 6

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