1-r=13

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Solution for 1-r=13 equation: 


Simplifying
1 + -1r = 13

Solving
1 + -1r = 13

Solving for variable 'r'.

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

Add '-1' to each side of the equation.
1 + -1 + -1r = 13 + -1

Combine like terms: 1 + -1 = 0
0 + -1r = 13 + -1
-1r = 13 + -1

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

Divide each side by '-1'.
r = -12

Simplifying
r = -12

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