-12=8r-5r

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Solution for -12=8r-5r equation:


Simplifying
-12 = 8r + -5r

Combine like terms: 8r + -5r = 3r
-12 = 3r

Solving
-12 = 3r

Solving for variable 'r'.

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

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

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

Add '12' to each side of the equation.
-12 + 12 + -3r = 0 + 12

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

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

Divide each side by '-3'.
r = -4

Simplifying
r = -4

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