-57=-12+3r

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Solution for -57=-12+3r equation:


Simplifying
-57 = -12 + 3r

Solving
-57 = -12 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
-57 + -3r = -12 + 3r + -3r

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

Add '57' to each side of the equation.
-57 + 57 + -3r = -12 + 57

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

Combine like terms: -12 + 57 = 45
-3r = 45

Divide each side by '-3'.
r = -15

Simplifying
r = -15

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