-12=1+r

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Solution for -12=1+r equation: 


Simplifying
-12 = 1 + r

Solving
-12 = 1 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-12 + -1r = 1 + r + -1r

Combine like terms: r + -1r = 0
-12 + -1r = 1 + 0
-12 + -1r = 1

Add '12' to each side of the equation.
-12 + 12 + -1r = 1 + 12

Combine like terms: -12 + 12 = 0
0 + -1r = 1 + 12
-1r = 1 + 12

Combine like terms: 1 + 12 = 13
-1r = 13

Divide each side by '-1'.
r = -13

Simplifying
r = -13

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