-57=-12+4r

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Solution for -57=-12+4r equation:


Simplifying
-57 = -12 + 4r

Solving
-57 = -12 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-57 + -4r = -12 + 4r + -4r

Combine like terms: 4r + -4r = 0
-57 + -4r = -12 + 0
-57 + -4r = -12

Add '57' to each side of the equation.
-57 + 57 + -4r = -12 + 57

Combine like terms: -57 + 57 = 0
0 + -4r = -12 + 57
-4r = -12 + 57

Combine like terms: -12 + 57 = 45
-4r = 45

Divide each side by '-4'.
r = -11.25

Simplifying
r = -11.25

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