12=-r-7

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Solution for 12=-r-7 equation: 


Simplifying
12 = -1r + -7

Reorder the terms:
12 = -7 + -1r

Solving
12 = -7 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
12 + r = -7 + -1r + r

Combine like terms: -1r + r = 0
12 + r = -7 + 0
12 + r = -7

Add '-12' to each side of the equation.
12 + -12 + r = -7 + -12

Combine like terms: 12 + -12 = 0
0 + r = -7 + -12
r = -7 + -12

Combine like terms: -7 + -12 = -19
r = -19

Simplifying
r = -19

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