8r-r=5r-12

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


Simplifying
8r + -1r = 5r + -12

Combine like terms: 8r + -1r = 7r
7r = 5r + -12

Reorder the terms:
7r = -12 + 5r

Solving
7r = -12 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
7r + -5r = -12 + 5r + -5r

Combine like terms: 7r + -5r = 2r
2r = -12 + 5r + -5r

Combine like terms: 5r + -5r = 0
2r = -12 + 0
2r = -12

Divide each side by '2'.
r = -6

Simplifying
r = -6

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