-12=-3.1+r

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Solution for -12=-3.1+r equation:


Simplifying
-12 = -3.1 + r

Solving
-12 = -3.1 + 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 = -3.1 + r + -1r

Combine like terms: r + -1r = 0
-12 + -1r = -3.1 + 0
-12 + -1r = -3.1

Add '12' to each side of the equation.
-12 + 12 + -1r = -3.1 + 12

Combine like terms: -12 + 12 = 0
0 + -1r = -3.1 + 12
-1r = -3.1 + 12

Combine like terms: -3.1 + 12 = 8.9
-1r = 8.9

Divide each side by '-1'.
r = -8.9

Simplifying
r = -8.9

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