12-r=18

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Solution for 12-r=18 equation:


Simplifying
12 + -1r = 18

Solving
12 + -1r = 18

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 + -1r = 18 + -12

Combine like terms: 12 + -12 = 0
0 + -1r = 18 + -12
-1r = 18 + -12

Combine like terms: 18 + -12 = 6
-1r = 6

Divide each side by '-1'.
r = -6

Simplifying
r = -6

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