-12=3-2r

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Solution for -12=3-2r equation:


Simplifying
-12 = 3 + -2r

Solving
-12 = 3 + -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
-12 + 2r = 3 + -2r + 2r

Combine like terms: -2r + 2r = 0
-12 + 2r = 3 + 0
-12 + 2r = 3

Add '12' to each side of the equation.
-12 + 12 + 2r = 3 + 12

Combine like terms: -12 + 12 = 0
0 + 2r = 3 + 12
2r = 3 + 12

Combine like terms: 3 + 12 = 15
2r = 15

Divide each side by '2'.
r = 7.5

Simplifying
r = 7.5

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