12=-4+r

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Solution for 12=-4+r equation: 


Simplifying
12 = -4 + r

Solving
12 = -4 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
12 + -1r = -4 + r + -1r

Combine like terms: r + -1r = 0
12 + -1r = -4 + 0
12 + -1r = -4

Add '-12' to each side of the equation.
12 + -12 + -1r = -4 + -12

Combine like terms: 12 + -12 = 0
0 + -1r = -4 + -12
-1r = -4 + -12

Combine like terms: -4 + -12 = -16
-1r = -16

Divide each side by '-1'.
r = 16

Simplifying
r = 16

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