-r+3=12

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Solution for -r+3=12 equation:


Simplifying
-1r + 3 = 12

Reorder the terms:
3 + -1r = 12

Solving
3 + -1r = 12

Solving for variable 'r'.

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

Add '-3' to each side of the equation.
3 + -3 + -1r = 12 + -3

Combine like terms: 3 + -3 = 0
0 + -1r = 12 + -3
-1r = 12 + -3

Combine like terms: 12 + -3 = 9
-1r = 9

Divide each side by '-1'.
r = -9

Simplifying
r = -9

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