13r-(-12)=103

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Solution for 13r-(-12)=103 equation: 


Simplifying
13r + -1(-12) = 103

Multiply -1 * -12
13r + 12 = 103

Reorder the terms:
12 + 13r = 103

Solving
12 + 13r = 103

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 13r = 103 + -12

Combine like terms: 12 + -12 = 0
0 + 13r = 103 + -12
13r = 103 + -12

Combine like terms: 103 + -12 = 91
13r = 91

Divide each side by '13'.
r = 7

Simplifying
r = 7

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