12+r=8

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Solution for 12+r=8 equation: 


Simplifying
12 + r = 8

Solving
12 + r = 8

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 + r = 8 + -12

Combine like terms: 12 + -12 = 0
0 + r = 8 + -12
r = 8 + -12

Combine like terms: 8 + -12 = -4
r = -4

Simplifying
r = -4

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