-12+3r=57

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Solution for -12+3r=57 equation: 


Simplifying
-12 + 3r = 57

Solving
-12 + 3r = 57

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 + 3r = 57 + 12

Combine like terms: -12 + 12 = 0
0 + 3r = 57 + 12
3r = 57 + 12

Combine like terms: 57 + 12 = 69
3r = 69

Divide each side by '3'.
r = 23

Simplifying
r = 23

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