-8+r=12

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Solution for -8+r=12 equation: 


Simplifying
-8 + r = 12

Solving
-8 + r = 12

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + r = 12 + 8

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

Combine like terms: 12 + 8 = 20
r = 20

Simplifying
r = 20

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